Brazil's women national football team pose before the London 2012 Olympic Games women's football match between New Zealand and Brazil at the Millennium Stadium in Cardiff, Wales, on July 28, 2012. (Top row from L: Brazil's midfielder Bruna, Brazil's midfielder Francielle, Brazil's defender Erika, Brazil's goalkeeper Andreia, Brazil's defender Renata Costa and Brazil's midfielder Danielle ; (bottom row from L: Brazil's midfielder Ester, Brazil's defender Maurine, Brazil's forward Marta, Brazil's forward Fabiana and Brazil's midfielder Formiga. AFP PHOTO / GLYN KIRK

Italy's Valentina Vezzali celebrates her victory over Tunisia's Ines Boubakri at the end of their women's foil fencing quarterfinal bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Turkey's Tugce Canitez (L) and Yasemin Horasan (C) celebrate after winning the Women's preliminary round group A basketball match of the London 2012 Olympic Games Turkey vs Angola on July 28, 2012 at the basketball arena in London. Turkey won 72 to 50. AFP PHOTO / MARK RALSTON

Italy's Valentina Vezzali celebrates her victory over Tunisia's Ines Boubakri at the end of their women's foil fencing quarterfinal bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Russia's Nataliya Goncharova (back) spikes the ball as Great Britain's Ciara Michel attempts to block during their women's volleyball match at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO/KIRILL KUDRYAVTSEV

LeBron James of the 2012 USA Basketball Men's National Team ponders reporters' questions on July 28, 2012 during pratice at the University of East London, during the London 2012 Olympic Games. AFP PHOTO / TIMOTHY A. CLARY

US gymnast Danell Leyva competes on the rings during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Jake Kaminski of US shotos an arrow during the men's Team Archery Eliminations match between China and US on Day 1 of the London 2012 Olympic Games at Lord's Cricket Ground on July 28, 2012 in London. AFP PHOTO/JEWEL SAMAD

Turkey's Tugce Canitez (C) vies with Angolan opponents during the Women's preliminary round group A basketball match of the London 2012 Olympic Games Turkey vs Angola on July 28, 2012 at the basketball arena in London. Turkey won 72 to 50. AFP PHOTO / MARK RALSTON

Japan's gymnast Ryohei Kato competes on the floor during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Kobe Bryant of the 2012 USA Basketball Men's National Team July 28, 2012 answers reporters' questions at pratice on July 28, 2012 at the University of East London, during the London 2012 Olympic Games. AFP PHOTO / TIMOTHY A. CLARY

Brazil's striker Cristiane (L) vies for the ball with New Zealand's defender Katie Hoyle during the London 2012 Olympic Games women's football match between New Zealand and Brazil at the Millennium Stadium in Cardiff, Wales on July 28, 2012. AFP PHOTO / GLYN KIRK

Turkish guard Isil Alben (C) dribbles during the Women's preliminary round group A basketball match of the London 2012 Olympic Games Turkey vs Angola on July 28, 2012 at the basketball arena in London. Turkey won 72 to 50. AFP PHOTO / MARK RALSTON

US gymnast Samuel Mikulak competes on the vault during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Russia's Nataliya Goncharova (L) spikes the ball as Britain's Ciara Michel attempts to block it during the women's volleyball match between Britain and Russia in the 2012 London Olympic Games in London on July 28, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Turkey's Yasemin Horasan (R) vies with Angolan forward Sonia Guadalupe during the Women's preliminary round group A basketball match of the London 2012 Olympic Games Turkey vs Angola on July 28, 2012 at the basketball arena in London. Turkey won 72 to 50. AFP PHOTO / MARK RALSTON

China's Wang Mingjuan lifts during the women's 48kg group A weightlifting competition at The Excel Centre in London on July 28, 2012, during the 2012 Olympic Games. AFP PHOTO / YURI CORTEZ

Britain's Ciara Michel (L) spikes the ball as Russia's Maria Borisenko (2ndR) attempts to block it during the women's volleyball match between Britain and Russia in the 2012 London Olympic Games in London on July 28, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Russia's Arsen Galstyan celebrates after winning against Japan's Hiroaki Hiraoka during their men's -60 kgs contest final match of the judo event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Russia's Arsen Galstyan celebrates after winning against Japan's Hiroaki Hiraoka during their men's -60 kgs contest final match of the judo event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Angolan guard Catarina Camufal jumps to score during the Women's preliminary round group A basketball match of the London 2012 Olympic Games Turkey vs Angola on July 28, 2012 at the basketball arena in London. Turkey won 72 to 50. AFP PHOTO / MARK RALSTON

Assan Bazayev of Kazakhstan (C) and Yukiya Arashiro of Japan (R) cross the finish line after the men's cycling road race event in London on July 28, 2012, during the London 2012 Olympic Games. AFP PHOTO/CARL DE SOUZA

Fumiyuki Beppu of Japan (C) leads the breakaway effort during the men's road cycling race on day 1 of the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / BRYN LENNON

Brazil's Sarah Menezes (blue) celebrates as she wins against Romania's Alina Dumitru during their women's -48 kgs contest final match of the judo event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / JOHANNES EISELE

A player of Britain's field hockey women's team takes a penalty shot during a practice session at the Riverbank Arena in London on July 28, 2012, on the first day of the London 2012 Olympic Games. AFP PHOTO/ INDRANIL MUKHERJEE

Switzerland's Sascha Heyer (R) and teammate Seba Chevallier celebrate scoring a point against China's Wu Penggen and Xu Linyin during their men's beach volleyball preliminary round match at the London 2012 Olympic Games in Horse Guards Parade, London, on July 28, 2012 . AFP PHOTO / DANIEL GARCIA

Bradley Wiggins of Britain is watched by two soldiers guarding the road crosses the finish line at the end of the men's road race cycling event in London on July 28, 2012, during The 2012 Olympic Games . AFP PHOTO / ODD ANDERSEN

Quadri Aruna of Nigeria returns a shot to Carlos Machado of Spain during a table tennis men's single preliminary round match of the London 2012 Olympic Games at the Excel centre in London on July 28, 2012. AFP Photo / Saeed Khan

Brady Ellison of the US shoots an arrow during the semi-final match in the men's teams event against South Korea on day 1 of the London 2012 Olympic Games at Lord's Cricket Ground on July 28, 2012 in London. AFP PHOTO/JEWEL SAMAD

Croatian centre Marija Vrsaljko (C) vies with US guard Maya Moore (L) and US centre Sylvia Fowles during the Women's preliminary round group A basketball match of the London 2012 Olympic Games USA vs Croatia on July 28, 2012 at the basketball arena in London. AFP PHOTO / MARK RALSTON

Britain's sailor Ben Ainslie speeds along on Weymouth Bay in a Finn class practice race during the London 2012 Olympic Games, in Weymouth on July 28, 2012. AFP PHOTO / WILLIAM WEST

PICTURE TAKEN WITH A ROBOTIC CAMERA US swimmer Michael Phelps (r) and Hungary's Laszlo Cseh compete in the men's 400m individual medley heats swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

India's Soumyajit Ghosh serves to Brazil's Gustavo Tsuboi during a table tennis men's singles preliminary round match of the London 2012 Olympic Games at the Excel centre in London July 28, 2012. AFP Photo / Saeed Khan

Denmark's Christinna Pedersen plays a shot as her partner Joachim Fischer (L) looks against Canada's Ng Toby (R) and Gao Grace (2R) during their mixed double badminton match at the London 2012 Olympic Game in London on July 28, 2012. Denmark's Joachim Fischer and Christinna Pedersen won 21-12, 21-11. AFP PHOTO / ADEK BERRY

Canada's Ng Toby (R) and Gao Grace (L) play against Denmark's Joachim Fischer and his partner Christinna Pedersen during their mixed doubles badminton match at the London 2012 Olympic Game in London on July 28, 2012. Denmark's Joachim Fischer and Christinna Pedersen won 21-12, 21-11. AFP PHOTO / ADEK BERRY

Serbia's Jelena Jankovic returns to Serena Williams of the US during their London 2012 Olympic Games women's singles tennis match at the All England Tennis Club in Wimbledon, southwest London, on July 28, 2012. in London on July 28, 2012.AFP PHOTO/Luis Acosta

Switzerland's Roger Federer celebrates after defeating Colombia's Alejandro Falla in their London 2012 Olympic Games men's singles tennis match at the All England Tennis Club in Wimbledon, southwest London, on July 28, 2012. in London on July 28, 2012.AFP PHOTO/Luis Acosta

Eventual gold medallist Alexandre Vinokourov of Kazakstan (C) rides with the peleton during the men's road race up Boxhill on the outskirts of London on July 28, 2012, during The 2012 London Olympic Games. Alexandre Vinokourov of Kazakhstan claimed an unexpected but deserved win in the men's Olympic road race, wrecking Mark Cavendish's hopes of delivering a first gold of the Games for the hosts. AFP PHOTO / MIGUEL MEDINA

Serbian Andrija Zlatic concentrates before shooting to get the bronze medal in 10m Air Rifle Men final at the London 2012 Olympic Games at the Royal Artillery Barracks in London, July 28, 2012. AFP PHOTO/MARWAN NAAMANI

Qatari shooter Bahya Mansour al-Hamad (C) competes during the 10m Air Rifle Women qualification at the Royal Artillery Barracks in London on July 28, 2012, during The London 2012 Olympic Games . AFP PHOTO/MARWAN NAAMANI

TOPSHOTS Great Britain's gymnast Max Whitlock competes on the floor during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Japan's gymnast Kohei Uchimura competes on the rings during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

TOPSHOTS Brazil's Sarah Menezes (top) celebrates after winning against Belgium's Charline Van Snick during their women's -48 kgs contest semi-final match of the judo event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / JOHANNES EISELE

Hungary's Eva Csernoviczki (white) competes with Japan's Tomoko Fukumi during their women's -48 kgs contest bronze medal match of the judo event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / JOHANNES EISELE

Hungary's Eva Csernoviczki (white) competes with Japan's Tomoko Fukumi during their women's -48 kgs contest bronze medal match of the judo event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / JOHANNES EISELE

Hungary's Eva Csernoviczki (white) competes with Japan's Tomoko Fukumi during their women's -48 kgs contest bronze medal match of the judo event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / FRANCK FIFE

Brazil's gymnast Diego Hypolito competes on the floor during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

South Korea's Oh Ha Na (L) fences against Italy's Elisa Di Francisca during their women's foil fencing semifinal bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

Britain's midfielder Jill Scott (L) vies with Cameroon's defender Christine Manie (R) during their women's football match at the Millennium Stadium in Cardiff, Wales on July 28, 2012 in London during the London 2012 Olympic Games. AFP PHOTO / GLYN KIRK

Switzerlands' Roger Federer (front) returns the ball to Colombia's Alejandro Falla during their London 2012 Olympic Games men's singles tennis match at the All England Tennis Club in Wimbledon, southwest London, on July 28, 2012. AFP PHOTO/ Martin Bernetti

US players celebrate after winning the Women's preliminary round group A basketball match of the London 2012 Olympic Games USA vs Croatia on July 28, 2012 at the basketball arena in London. USA won 81 to 56. AFP PHOTO / MARK RALSTON

Ibrahim al-Hassan of Kuwait (back) serves to Paul Drinkhall of Britain during their London 2012 Olympic Games table tennis men's singles preliminary round match at the Excel centre in London on July 28, 2012. AFP Photo / Saeed Khan

Peta Todd, the partner of Great Britain cyclist Mark Cavendish, holds their daughter Delilah, as she watches him competing in the men's road cycling race on day 1 of the London 2012 Olympic Games on July 28, 2012, in London. Kazakhstan's Alexandre Vinokourov won the gold medal. AFP PHOTO / JOHN STILLWELL/POOL

French sailor Julien Bontemps (C) trains with Swizterland's Richard Stauffacher (L) and Greece's Byron Kokalanis in the RS:X sailing class for the London 2012 Olympic Games, in Weymouth on July 28, 2012. AFP PHOTO/William WEST

Brazil's Juliana Silva (C) blocks the ball in front of Natacha Rigobert and Li Yuk Lo from Mauritus during their women's beach volleyball preliminary phase pool C match at the Centre Court of the Horse Guards Parade stadium, on July 28, 2012 in London, during the London 2012 Olympic Games . AFP PHOTO / DANIEL GARCIA

TOPSHOTS Japan's gymnast Kohei Uchimura competes on the rings during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

TOPSHOTS US gymnast Danell Leyva competes on the horizontal bar during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

TOPSHOTS Sweden's pivot Ulrika Agren (L) shoots under the look of Denmark's leftback Trine Troelsen during the women's preliminaries Group B handball match Denmark vs Sweden for the London 2012 Olympics Games on July 28, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

TOPSHOTS Britain's hockey team players stretch during a practice session at the Riverbank Arena in London on July 28, 2012, on the first day of the London 2012 Olympic Games. AFP PHOTO/ INDRANIL MUKHERJEE

TOPSHOTS Kazakhstan's Alexandre Vinokourov rides to win the men's cycling road race event ahead of Colombia's Rigoberto Uran (L) in London during the London 2012 Olympic games on July 28, 2012 AFP PHOTO/ MANAN VATSYAYANA

Jean-Michel Saive of Belgium serves to Marko Jevtovic of Serbia during their London 2012 Olympic Games table tennis men's singles preliminary round match at the Excel centre in London on July 28, 2012. AFP Photo / Saeed Khan

Turkey's Karagoz Nurdan fails in her lift during the women's 48kg group A weightlifting at the Excel Center during the 2012 Olympic Games in London on July 28, 2012. AFP PHOTO / YURI CORTEZ

This combo picture shows Turkey's Karagoz Nurdan failing in her lift during the women's 48kg group A weightlifting at the Excel Center during the 2012 Olympic Games in London on July 28, 2012. AFP PHOTO / YURI CORTEZ

US centre Sylvia Fowles (R) jumps to score next to Croatian forward Ana Lelas during the Women's preliminary round group A basketball match of the London 2012 Olympic Games USA vs Croatia on July 28, 2012 at the basketball arena in London. USA won 81 to 56. AFP PHOTO / POOL / SERGIO PEREZ

Teams of Poland, Ukraine, US and Australia take the start of the eight men of the rowing event of the rowing event during the London 2012 Olympic Games, at Eton Dorney Rowing Centre in Eton, west of London, on July 28, 2012. AFP PHOTO / ERIC FEFERBERG

Italy's Valentina Vezzali (R) fences against South Korea's Nam Hyun Hee during their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Italy's Valentina Vezzali (R) fences against South Korea's Nam Hyun Hee during their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

Italy's Valentina Vezzali (R) fences against South Korea's Nam Hyun Hee during their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Italy's Valentina Vezzali (R) fences against South Korea's Nam Hyun Hee during their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

Italy's Valentina Vezzali celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

US swimmer Michael Phelps (front) competes in the men's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. He finished fourth. AFP PHOTO / FABRICE COFFRINI

Italy's Valentina Vezzali celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

Italy's Valentina Vezzali celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

Italy's Valentina Vezzali celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

Norway sailors Eivind Melleby and Petter Morland Pedersen compete in a Star sailing class practice race for the London 2012 Olympic Games, in Weymouth on July 28, 2012. AFP PHOTO/William WEST

Britain's pivot Lyn Byl jumps to shoot during the women's preliminaries Group A handball match Montenegro vs Great Britain for the London 2012 Olympics Games on July 28, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

Italy's Valentina Vezzali celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

South Korea's Nam Hyun Hee reacts after being defeated by Italy's Valentina Vezzali at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

South Korea's Nam Hyun Hee reacts after being defeated by Italy's Valentina Vezzali at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

PICTURE TAKEN WITH A ROBOTIC CAMERA US swimmer Michael Phelps prepares to compete in the men's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

US swimmer Michael Phelps reacts after competing in the men's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. He finished fourth. AFP PHOTO / FABRICE COFFRINI

US swimmer Michael Phelps reacts after competing in the men's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. He finished fourth. AFP PHOTO / FABRICE COFFRINI

US swimmer Michael Phelps reacts after competing in the men's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. He finished fourth. AFP PHOTO / FABRICE COFFRINI

US swimmer Michael Phelps competes in the men's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. He finished fourth. AFP PHOTO / FABRICE COFFRINI

Italy's Valentina Vezzali celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Italy's Valentina Vezzali (R) celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Michele Frangilli (L), Marco Galiazzo (R) and Mauro Nespoli (C) celebrate after defeating the US in the London 2012 Olympic Games men's team archery final match at the at Lord's Cricket Ground on July 28, 2012 in London. Italy defeated the US to win gold as South Korea got bronze. AFP PHOTO/JEWEL SAMAD

Italy's Valentina Vezzali (R) celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Italy's Valentina Vezzali (R) fences against South Korea's Nam Hyun Hee during their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

PICTURE TAKEN WITH A ROBOTIC CAMERA Nigeria's Segun Toriola plays a stroke to Sweden's Persson Jorgen during their first round men's table-tennis match for The 2012 London Olympic Games in London on July 28, 2012. AFP PHOTO / ANTONIN THUILLIER

Italy's Valentina Vezzali celebrates her victory over South Korea's Nam Hyun Hee at the end of their women's foil bronze medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

PICTURE TAKEN WITH A ROBOTIC CAMERA Brazil's Hugo Hoyama (L) plays a stroke to Poland's Zengyi Wang (R) during their first round men's table-tennis match for The 2012 London Olympic Games in London on July 28, 2012. AFP PHOTO / ANTONIN THUILLIER

US swimmer Michael Phelps reacts after competing in the men's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / MARTIN BUREAU

Italy's Arianna Errigo (L) fences against Italy's Elisa Di Francisca during their women's foil gold medal fencing bout as part of the London 2012 Olympic games, on July 28, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

China's Sun Yang celebrates after winning the men's 400m freestyle final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / MARTIN BUREAU

China's Sun Yang reacts after winning the men's 400m freestyle final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / EMMANUEL DUNAND

China's Ye Shiwen (R) celebrates after winning the women's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / MARTIN BUREAU

Montenegro's pivot Ana Dokic vies during the women's preliminaries Group A handball match Montenegro vs Great Britain for the London 2012 Olympics Games on July 28, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

Montenegro's pivot Suzana Lazovic jumps to shoot during the women's preliminaries Group A handball match Montenegro vs Great Britain for the London 2012 Olympics Games on July 28, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

Montenegro's Milena Knezevic (L) jumps to shoot as she vies with Britain's rightback Marie Gerbron during the women's preliminaries Group A handball match Montenegro vs Great Britain for the London 2012 Olympics Games on July 28, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

US swimmer Elizabeth Beisel competes in the women's 400m individual medley final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. She won silver. AFP PHOTO / LEON NEAL

TOPSHOTS Montenegro's pivot Ana Dokic vies during the women's preliminaries Group A handball match Montenegro vs Great Britain for the London 2012 Olympics Games on July 28, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

TOPSHOTS China's Sun Yang stretches prior to compete in the men's 400m freestyle final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. He won gold. AFP PHOTO / FABRICE COFFRINI

Jonas Matheus (R) of Namibia defends against Jahyn Vittorio Parrinello (L) of Italy during their first round Bantamweight (56Kg) bout of the 2012 London Olympic Games on July 28, 201 2 at the ExCel Arena in London. Parrinello took an 18-7 decision victory. AFP PHOTO / Jack GUEZ

US swimmer Dana Vollmer competes in the women's 100m butterfly semi-final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / FABRICE COFFRINI

PICTURE TAKEN WITH UNDERWATER CAMERA (FromL) Netherland's Inge Dekker, Australia's Alicia Coutts and US' Missy Franklin compete in the women's 4 x 100m freestyle relay final swimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

Australia's Melanie Schlanger reacts after winning the women's 4 x 100m freestyle relay finalswimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / FABRICE COFFRINI

South Korea's Jung Dae-Young (R) and Kim Hee-Jin attempt to block during the women's volleyball match between the United States and South Korea at the 2012 London Olympic Games in London on July 28, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Germany's gymnast Philipp David Boy reacts as he falls from the horizontal bar during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Jorgen Persson of Sweden serves to Segun Toriola of Nigeria during a table tennis men's single preliminary round match of the London 2012 Olympic Games at the Excel centre in London July 28, 2012. AFP Photo / Saeed Khan

Russia's gymnast Igor Parkhomenko competes on the floor during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

France's leftback Raphaelle Tervel (R) shoots as she vies with Norway's Kristine Lunde-Borgersen during the women's preliminaries Group B handball match Norway vs France for the London 2012 Olympics Games on July 28, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

Japan's Kazuki Yazawa (L) attends a men's Kayak Slalom training session at the 2012 London Olympic Games on July 28, 2012 at "Lee Valley Water Park" in London. AFP PHOTO / OLIVIER MORIN

Russia's gymnast Emin Garibov competes on the rings during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

Germany's gymnast Fabian Hambuchen competes on the pommel horse during the men's qualification of the artistic gymnastics event of the London Olympic Games on July 28, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

French centre Emmeline Ndongue (R) vies with Brazilian guard Adriana Pinto during the women's preliminary round group B basketball match of the London 2012 Olympic Games Brazil vs France on July 28, 2012 at the basketball arena in London. France won 73 to 58. AFP PHOTO / MARK RALSTON

TOPSHOTS South Korea's Kim Yeon-Koung spikes in the women's volleyball match between the USA and South Korea during the 2012 London Olympic Games in London on July 28, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

TOPSHOTS Australia's Alicia Coutts, Cate Campbell, Brittany Elmslie and Melanie Schlanger celebrate after winning the women's 4 x 100m freestyle relay finalswimming event at the London 2012 Olympic Games on July 28, 2012 in London. AFP PHOTO / LEON NEAL

US' Sean Rosenthal controls the ball during the men beach volleyball preliminary phase Pool D match US vs South Africa at the Centre Court of the Horse Guards Parade stadium on July 28, 2012 in London during the London 2012 Olympic Games. USA won 2-0. AFP PHOTO / DANIEL GARCIA

South Africa's Grant Goldschmidt dives for the ball during the men beach volleyball preliminary phase Pool D match US vs South Africa at the Centre Court of the Horse Guards Parade stadium on July 28, 2012 in London during the London 2012 Olympic Games. USA won 2-0. AFP PHOTO / DANIEL GARCIA

Ukraine's Tetyana Bilenko serves to Romania's Daniela Dodean in their table tennis women's singles preliminary round match at the Excel centre in London July 28, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

TOPSHOTS Australian center Suzy Batkovic dribbles during the women's preliminary round group B basketball match of the London 2012 Olympic Games Australia vs Great Britain on July 28, 2012 at the basketball arena in London. AFP PHOTO / TIMOTHY A. CLARY

British centre Azania Stewart (L) vies with Australian center Suzy Batkovic during the women's preliminary round group B basketball match of the London 2012 Olympic Games Australia vs Great Britain on July 28, 2012 at the basketball arena in London. AFP PHOTO / TIMOTHY A. CLARY

US' Tejay Van Garderen leads the breakaway during the Men's Road Race Road Cycling on day 1 of the London 2012 Olympic Games on July 28, 2012 in London, England. AFP PHOTO / POOL / BRYN LENNON

Norway's Lars Petter Nordhaug launches an attack during the Men's Road Race Road Cycling on day 1 of the London 2012 Olympic Games on July 28, 2012 in London, England. AFP PHOTO / POOL / BRYN LENNON

British guard Natalie Stafford is pictured during the Women's preliminary round group A basketball match of the London 2012 Olympic Games Australia vs Great Britian on July 28, 2012 at the basketball arena in London. AFP PHOTO / TIMOTHY A. CLARY

Austria's Liu Jia returns a shot to Belarus' Aleksandra Privalova during a table tennis Women's singles preliminary round match of the London 2012 Olympic Games at the Excel centre in London July 28, 2012. AFP Photo / Saeed Khan

Spain's Sara Ramirez serves to Ukraine's Margaryta Pesotska during a table tennis women's singles preliminary round match of the London 2012 Olympic Games at the Excel centre in London July 28, 2012. AFP Photo / Saeed Khan