French guard Tony Parker catches the ball during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO /EMMANUEL DUNAND

French guard Tony Parker (L) challenges US forward LeBron James during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO /EMMANUEL DUNAND

US forward LeBron James (C) hangs on the hoop during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO /TIMOTHY A. CLARY

Japan's Masashi Ebinuma leaves after losing against Georgia's Lasha Shavdatuashvili during their men's -66kg contest semi-final match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Japan's Masashi Ebinuma leaves with his coach after losing against Georgia's Lasha Shavdatuashvili during their men's -66kg contest semi-final match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / JOHANNES EISELE

US guard Deron Williams (C) shoots during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO /EMMANUEL DUNAND

(R-L) United States's Anthony Fahden, William Newell, Nicholas La Cava and Robin Prendes compete to win the men's lightweight four repechages of the rowing event during the London 2012 Olympic Games, at Eton Dorney Rowing Centre in Eton, west of London, on July 29, 2012. AFP PHOTO / ERIC FEFERBERG

Football teams of Mexico (L) and Gabon line before their London 2012 Olympic men's football match at The City of Coventry Stadium in Coventry, central England, on July 29, 2012. AFP PHOTO/PAUL ELLIS

Gabon's players pose for a family picture before their London 2012 Olympic men's football match against Mexico at The City of Coventry Stadium in Coventry, central England, on July 29, 2012. AFP PHOTO/PAUL ELLIS

Mexico's players pose for a family picture before their London 2012 Olympic men's football match against Gabon at The City of Coventry Stadium in Coventry, central England, on July 29, 2012. AFP PHOTO/PAUL ELLIS

US forward LeBron James hangs on the hoop during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO /TIMOTHY A. CLARY

Italy's Stefano Tempesti (C) saves a goal during the Water Polo Group A preliminary match of the 2012 London Olympic Games between Italy and Australia on July 29,2012. AFP PHOTO / GABRIEL BOUYS

Italy's Rosalba Forciniti (blue) celebrates after winning against Luxemburg's Marie Muller during their women's -52kg contest match of the judo event at the London 2012 Olympic Games on July 29, 2012 ExCel arena in London. AFP PHOTO / JOHANNES EISELE

Luxemburg's Marie Muller (white) competes with Italy's Rosalba Forciniti (blue) during their women's -52kg contest match of the judo event at the London 2012 Olympic Games on July 29, 2012 ExCel arena in London. AFP PHOTO / JOHANNES EISELE

Selemani Kidunda (L) of Tanzania defends against Vasilii Belous (R) of Moldova during their first round Welterweight (69Kg) match of the London 2012 Olymipic Games on July 29, 2012 at the Excel Arena in London. Belous was awarded a 20-7 points decision. AFP PHOTO / Jack GUEZ

Canada's Emilie Heymans and Jennifer Abel dive during the women's synchronised 3m springboard diving event at the London 2012 Olympic Games on July 29, 2012 in London. AFP PHOTO / FABRICE COFFRINI

Japan's Mizuki Fujii (L) returns a shuttercock in front of her teammate Reika Kakiiwa during the women's doubles badminton match against Singapore's Shinta Mulia Sari and Yao Lei at the London 2012 Olympic Game in London, on July 29, 2012. AFP PHOTO / ADEK BERRY

France's Priscilla Gneto celebrates after winning against Belgium's Ilse Heylen during their women's -52kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 ExCel arena in London. AFP PHOTO / JOHANNES EISELE

South Korea's Lee Sung Jin competes during the women's team quaterfinal match between South Korea and Denmark of the London 2012 Olympic Games at Lord's Cricket Ground in London on July 29, 2012. AFP PHOTO/JEWEL SAMAD

Serbia's Novak Djokovic waits a serve from Italy's Fabio Fognini during their London 2012 Olympic Games men's singles tennis match first round at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO/ LUIS ACOSTA

Serbia's Novak Djokovic returns to Italy's Fabio Fognini during their London 2012 Olympic Games men's singles tennis match first round at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO/ LUIS ACOSTA

US divers Abigail Johnston and Kelci Bryant dive during the women's synchronised 3m springboard diving event at the London 2012 Olympic Games on July 29, 2012 in London. AFP PHOTO / FABRICE COFFRINI

Noshad Alamiyan of Iran celebrates his victory over Tang Peng of Hong Kong during their table tennis men's singles preliminary round match of the London 2012 Olympic Games at The Excel Centre in London on July 29, 2012. AFP PHOTO / SAEED KHAN

US guard Russell Westbrook (L) is challenged by French guard Nando De Colo (R) during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO / MARK RALSTON

Japan's Reika Kakiiwa (L) returns a shuttercock next to teammate Mizuki Fujii (L) as they play their women's doubles badminton match against Singapore's Shinta Mulia Sari and Yao Lei at the London 2012 Olympic Game in London, on July 29, 2012. AFP PHOTO / ADEK BERRY

TOPSHOTS Poland's Pawel Zagrodnik (blue) competes with Azerbaijan's Tarlan Karimov (white) during their men's -66kg contest match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Italy's Fabio Fognini returns to Serbia's Novak Djokovic during their London 2012 Olympic Games men's singles tennis match first round at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO/ LUIS ACOSTA

Japan's Reika Kakiiwa (R) returns a shuttercock next to teammate Mizuki Fujii as they play their women's doubles badminton match against Singapore's Shinta Mulia Sari and Yao Lei at the London 2012 Olympic Game in London, on July 29, 2012. AFP PHOTO / ADRIAN DENNIS

France's Priscilla Gneto celebrates with national coach Martine Dupond after winning against Belgium's Ilse Heylen during their women's -52kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 ExCel arena in London. AFP PHOTO / FRANCK FIFE

France's Priscilla Gneto celebrates with national coach Martine Dupond after winning against Belgium's Ilse Heylen during their women's -52kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 ExCel arena in London. AFP PHOTO / FRANCK FIFE

Canada's Emilie Heymans and Jennifer Abel dive during the women's synchronised 3m springboard diving event at the London 2012 Olympic Games on July 29, 2012 in London. AFP PHOTO / FABRICE COFFRINI

France's gymnast Anne Kuhm performs on the beam during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

Brazil's midfielder Sandro (C) controls the ball during the London 2012 Olympic Games men's football match between Brazil and Belarus at Old Trafford in Manchester, north-west England on July 29, 2012. AFP PHOTO / ANDREW YATES

Brazil's Neymar (R) vies with Belarus' Renan Bardini Bressan during the London 2012 Olympic Games men's football match between Brazil and Belarus at Old Trafford in Manchester, north-west England, on July 29, 2012. AFP PHOTO / ANDREW YATES

French guard Tony Parker catches the ball during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO / EMMANUEL DUNAND

Gold medallist Kimberly Rhode of the US gestures as she takes part in the women's skeet competion at The Royal Artillery Barracks in London on July 29, 2012, at the London 2012 Olympic Games. Rhode scored a new Olympic Record of 99 points. AFP PHOTO/MARWAN NAAMANI

Japan's Masashi Ebinuma (blue) reacts as he wins against Poland's Pawel Zagrodnik (white) during their men's -66kg contest match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Japan's Masashi Ebinuma (blue) competes with Poland's Pawel Zagrodnik (white) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / JOHANNES EISELE

Japan's Masashi Ebinuma (blue) competes with Poland's Pawel Zagrodnik (white) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / JOHANNES EISELE

Argentina's players celebrate winning a point during the men's volleyball match between Australia and Argentina of the London 2012 Olympic Games in London on July 29, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Pawel Zagrodnik (white) reacts after losing against Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) reacts after losing against Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Poland's Pawel Zagrodnik (white) competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Australia's Aden Tutton attempts to set during the men's volleyball match between Australia and Argentina of the London 2012 Olympic Games in London on July 29, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Australia's Aidan Zingel (L) and Thomas Edgar react during the men's volleyball match between Australia and Argentina of the London 2012 Olympic Games on July 29, 2012 in London. AFP PHOTO/KIRILL KUDRYAVTSEV

Canada's Vasel Pospisil plays a shot against Spain's David Ferrer during their men's singles tennis match at the London 2012 Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO / MIGUEL MEDINA

Canada's Vasel Pospisil plays a shot against Spain's David Ferrer during their men's singles tennis match at the London 2012 Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO / MIGUEL MEDINA

Spain's David Ferrer plays a shot against Canada's Vasel Pospisil during their men's singles tennis match at the London 2012 Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO / MIGUEL MEDINA

Spain's David Ferrer plays a shot against Canada's Vasel Pospisil during their men's singles tennis match at the London 2012 Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO / MIGUEL MEDINA

Poland's Pawel Zagrodnik (white) reacts as he competes with Japan's Masashi Ebinuma (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Korea's Cho Jun-Ho (white) competes with Spain's Sugoi Uriarte (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Korea's Cho Jun-Ho (white) competes with Spain's Sugoi Uriarte (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Korea's Cho Jun-Ho (white) competes with Spain's Sugoi Uriarte (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / JOHANNES EISELE

Kimberly Rhode of the US celebrates after winning a gold medal in the London 2012 Olympic Games skeet women competition at the Royal Artillery Barracks in London, on July 29, 2012. Kimberly Rhode won the gold medal and scored a new Olympic records of 99 points. AFP PHOTO/MARWAN NAAMANI

Marianne Vos of The Netherlands celebrates after sprinting for the line to victory over Elizabeth Armitstead of Britain at the conclusion of the women's cycling road race in London on July 29, 2012, during The 2012 London OIympic Games. AFP PHOTO / ODD ANDERSEN

Japan's Reika Kakiiwa (R) and Mizuki Fujii (bottom L) play against Singapore's Shinta Mulia Sari (top R) and Yeo Lee during their women's doubles badminton match at the London 2012 Olympic Game in London on July 29, 2012. Kakiiwa and Fujii won the match 16-21, 21-10, 21-19. AFP PHOTO / ADRIAN DENNIS

Saylom Ardee (L) of Thailand goes on the offensive against Gani Zhailauov (R) of Kazakhstan during their first round Lightweight (60Kg) match of the London 2012 Olymipic Games on July 29, 2012 at the Excel Arena in London. Ardee, who led 5-4 after the first round with the fight then being tied at 8-8 going into the final round, felt he had been cheated out of an upset win over world bronze boxing medallist Zhailauov after the bout finished 12-12. AFP PHOTO / Jack GUEZ

Korea's Cho Jun-Ho (white) celebrates after winning against Spain's Sugoi Uriarte (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Korea's Cho Jun-Ho (white) celebrates after winning against Spain's Sugoi Uriarte (blue) during their men's -66kg contest bronze medal match of the judo event at the London 2012 Olympic Games on July 29, 2012 at the ExCel arena in London. AFP PHOTO / FRANCK FIFE

Andy Murray of Britain returns the ball against Stanistas Wawrinka of Switzerland during their men's singles tennis match at the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO / Martin Bernetti

Serbia's Rajko Prodanovic (R)jumps to shoot during the men's preliminaries Group B handball match Spain vs Serbia for the London 2012 Olympics Games on July 29, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

Kazakstan's Yaroslava Shvedova plays a shot against Roumania's Simona Halep during their women's singles tennis match of the London 2012 Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO/ MIGUEL MEDINA

North Korea's An Kum Ae celebrates after winning against Cuba's Yanet Bermoy Acosta during their women's -52kg contest final match of the judo event at the London 2012 Olympic Games on July 29, 2012 ExCel arena in London. AFP PHOTO / FRANCK FIFE

North Korea's An Kum Ae celebrates with her coach after winning against Cuba's Yanet Bermoy Acosta during their women's -52kg contest final match of the judo event at the London 2012 Olympic Games on July 29, 2012 ExCel arena in London. AFP PHOTO / FRANCK FIFE

Brazil's Neymar (2ndR) celebrates with teammates Oscar (3rdR), Juan (R), Marcelo (2ndL) and Thiago Silva after scoring his team's second goal during the London 2012 Olympic Games men's football match between Brazil and Belarus at Old Trafford in Manchester, north-west England on July 29, 2012. AFP PHOTO / ANDREW YATES

Gabon's defender Bruno Ecuele (R) is tackled by Mexico's defender Hiram Mier during the London 2012 Olympic men's football match between Gabon and Mexico at The City of Coventry Stadium in Coventry, central England, on July 29, 2012. AFP PHOTO/PAUL ELLIS

US divers Abigail Johnston and Kelci Bryant compete during the women's synchronised 3m springboard diving event at the London 2012 Olympic Games on July 29, 2012 in London. AFP PHOTO / MARTIN BUREAU

US Kimberly Rhode jubilates as she stands on the podium after winning the gold medal in the skeet women competition at the London 2012 Olympic Games at the Royal artillery Barracks in London, on July 29, 2012. Rhode scored a new olympic records of 99 points. AFP PHOTO/MARWAN NAAMANI

Daniel Vargas of Hungary (L) shoots in front of Zivko Gocic of Serbia during the Water Polo Group B preliminary match Hungary vs Serbia of the 2012 London Olympic Games, on July 29,2012 in London. AFP PHOTO / GABRIEL BOUYS

Argentina's Liu Song serves to Slovenia's Bojan Tokic during their table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

Britain's gymnast Beth Tweddle performs on the uneven bars during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Dominican Republic's Lin Ju returns a shot to Portugal's Marcos Freitas during a table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

Chinese Ning Wei competes in the skeet shooting women final at the London 2012 Olympic Games at the Royal Artillery Barracks in London, on July 29, 2012. Ning Wei won the silver medal. AFP PHOTO/MARWAN NAAMANI

Spectators applaud as the peleton led by Marianne Vos of The Netherlands (R) rides up Boxhill on the outskirts of London, during the women's cycling road race in London on July 29, 2012, for the 2012 London OIympic Games. Dutch cycling sensation Marianna Vos finally added Olympic road race gold to her impressive collection of titles after dominating Britain's Lizzie Armitstead in a two-up sprint. AFP PHOTO/ MANAN VATSYAYANA

Austria's Werner Schlager returns a shot to Italy's Mihai Bobocica during their table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

(From L) Britain's gymnasts Rebecca Tunney, Jennifer Pinches, Hannah Whelan, Beth Tweddle and Imogen Cairns pose during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Brazil's Oscar (R) vies with Belarus' Mikhail Gordeichuk during the London 2012 Olympic Games men's football match between Brazil and Belarus at Old Trafford in Manchester, north-west England on July 29, 2012. AFP PHOTO / ANDREW YATES

Spanish centre Marc Gasol (L) is challenged by Chinese centre Yi Jianlian during the Men's Preliminary Round Group B match Spain vs China at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO / TIMOTHY A. CLARY

Germany's gymnast Oksana Chusovitina performs on the beam during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

Hungary's Daniel Zwickl serves to Serbia's Aleksandar Karakasevic during their table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

Serbia's Aleksandar Karakasevic returns a shot to Hungary's Daniel Zwickl during their table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

Germany's Christine Wenzel competes in the skeet women's final during the London 2012 Olympic Games at the Royal Artillery Barracks in London, July 29, 2012. AFP PHOTO/MARWAN NAAMANI

Spain's He Zhiwen returns a shot to Poland's Zengyl Wang during their table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

Latvia's Martins Plavins controls the ball with partner Janis Smedins (unseen) during the men's Beach Volleyball preliminary phase Pool E match against Germany's Jonathan Erdmann and Kay Matysik on The Centre Court Stadium in Horse Guards Parade on London on July 29, 2012, for the London 2012 Olympic Games. Latvia won 2-1. AFP PHOTO / DANIEL GARCIA

Japan's Takahiro Ohgihara (C) vies with Morocco's Driss Fettouhi (bottom) during the London 2012 Olympic Games men's football match at St James' Park, Newcastle upon Tyne, England, on July 29, 2012. AFP PHOTO/GRAHAM STUART

Kazakhstan's Zulfiya Chinshanlo celebrates on the podium after winning the weightlifting women's 53kg group A of the London 2012 Olympic Games at the Excel Center in London on July 29, 2012. AFP PHOTO / YURI CORTEZ

Spain's He Zhiwen celebrates his victory over Poland's Zengyl Wang during their table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

Poland's Whang Zengyl returns a shot to Spain's He Zhiwen during their table tennis men's singles preliminary round match at the Excel centre in London July 29, 2012 during the London 2012 Olympic Games. AFP Photo / Saeed Khan

Netherlands' Marianne Vos (R) rides ahead of Elizabeth Armitstead of Britain to victory in the women's cycling road race on The Mall in London on July 29, 2012, at the London 2012 Olympic Games. Dutch cycling sensation Marianna Vos finally added Olympic road race gold to her impressive collection of titles after dominating Britain's Lizzie Armitstead in a two-up sprint. Armitstead finished second at over a bike length behind to take the silver with Olga Zabelinskaya of Russia winning the bronze after 140 km of road racing. AFP PHOTO / CHARLIE RIEDEL/POOL

Russia's Maria Sharapova celebrates her victory over Israel's Shahar Peer during their women's singles tennis first round match at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012 during the 2012 London Olympic Games. AFP PHOTO/ Martin Bernetti

Russia's Maria Sharapova returns the ball against Israel's Shahar Peer during their women's single tennis first round match of the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO/ Martin Bernetti

Russia's Nikolay Kovalev (R) fences against Hungary's Aron Szilagyi during their Men's Sabre semi-final fencing bout as part of the London 2012 Olympic games, on July 29, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

China's gymnast Yao Jinnan performs on the uneven bars during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Chinese centre Yi Jianlian hangs on the hoop during the Men's Preliminary Round Group B match Spain vs China at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO / TIMOTHY A. CLARY

Russia's Maria Sharapova returns a shot to Israel's Shahar Peer during their women's singles tennis first round match at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012 during the 2012 London Olympic Games. AFP PHOTO/ Luis Acosta

Papa Gueye (L) of Senegal vies with Nicolas Lodeiro of Uruguay during the 2012 London Olympic Games men's football match between Uruguay and Senegal on July 29, 2012 at Wembley Stadium in London. AFP PHOTO / KHALED DESOUKI

Russia's gymnast Aliya Mustafina performs on the uneven bars during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Germany's gymnast Elisabeth Seitz performs on the floor during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / BEN STANSALL

Russia's Maria Sharapova returns to Israel's Shahar Peer during their London 2012 Olympic Games tennis match at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012. AFP PHOTO/ MARTIN BERNETTI

US players Russell Holmes (L) and William Priddy (C) celebrate winning a point against Aleksandar Atanasijevic of Serbia during the men's volleyball match between USA and Serbia in the 2012 London Olympic Games in London on July 29, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Matthew Anderson of the US attempts to set during the men's volleyball match between the US and Serbia in the 2012 London Olympic Games in London on July 29, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Italy's Diego Occhiuzzi (R) fences against Romania's Rares Dumitrescu during their Men's Sabre semi-final fencing bout as part of the London 2012 Olympic games, on July 29, 2012 at the ExCel centre in London. AFP PHOTO / ALBERTO PIZZOLI

Denmark's Jonas Hogh-Christensen celebrates as he wins race two in the Finn sailing class at the London 2012 Olympic Games, in Weymouth on July 29, 2012. AFP PHOTO/William WEST

Venezuela's gymnast Jessica Lopez performs on the beam during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

Colombia's Rusmeris Villar Barbosa competes in the weightlifting women's 53kg group A category at the London 2012 Olympic Games on July 29, 2012 at the Excel Center in London. AFP PHOTO / YURI CORTEZ

Colombia's gymnast Jessica Gil Ortiz performs on the beam during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

Russia's gymnast Aliya Mustafina performs on the beam during the women's qualification of the artistic gymnastics event of the London Olympic Games on July 29, 2012 at the 02 North Greenwich Arena in London. AFP PHOTO / THOMAS COEX

Korea's Chuyoung Park (C) celebrates after scoring a goal during the London 2012 Olympic men's football match between South Korea and Switzerland at The City of Coventry Stadium in Coventry, central England, on July 29, 2012. AFP PHOTO/PAUL ELLIS

Italy's Diego Occhiuzzi (R) fences against Romania's Rares Dumitrescu during their Men's Sabre semi-final fencing bout as part of the London 2012 Olympic games, on July 29, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Spain's basketball players celebrate after winning 97-81 the Men's Preliminary Round Group B match Spain vs China at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO / MARK RALSTON

China's basketball players applaud after losing 97-81 the Men's Preliminary Round Group B match Spain vs China at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO / MARK RALSTON

Germany's Hannes Aigner competes in the kayak Single men's 2nd round on July 29, 2012 at " Lee Valley Water Park", in London. AFP PHOTO OLIVIER MORIN

Italy's Diego Occhiuzzi celebrates his victory over Romania's Rares Dumitrescu at the end of their Men's Sabre semi-final fencing bout as part of the London 2012 Olympic games, on July 29, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Uruguay's Abel Hernandez (R) vies for the ball with Senegal's Papa Gueye during the London 2012 Olympic Games men's football match between Senegal and Uruguay at Wembley Stadium in London on July 29, 2012. Senegal won 2-0. AFP PHOTO / ADRIAN DENNIS

Czech Republic's Vavrinec Hradilek competes during kayak Single men's 2nd round on July 29, 2012 at " Lee Valley Water Park", in London. AFP PHOTO OLIVIER MORIN

Senegal's players pose before their football match against Uruguay during the 2012 London Olympic Games on July 29, 2012 at Wembley Stadium in London. Senegal won 2-0. AFP PHOTO / KHALED DESOUKI

Senegal's players pose before the football match against Uruguay at Wembley Stadium in London on July 29, 2012 during the London 2012 Olympic Games. Senegal won the game 2-0. AFP PHOTO / KHALED DESOUKI

Liu Jia of Netherlands returns to Natalia Partyka of Poland during their London 2012 Olympic Games table tennis women's singles match at the Excel centre in London on July 29, 2012. AFP Photo / Saeed Khan

Senegal's Stephane Badji (L) vies for the ball with Uruguay's Edinson Cavani during the 2012 London Olympic Games men's football match between Uruguay and Senegal on July 29, 2012 at Wembley Stadium in London. AFP PHOTO / KHALED DESOUKI

Brazil's Thomas Bellucci plays a shot against France's Jo-Wilfred Tsonga during their men's singles tennis match at the All England Tennis Club in Wimbledon, southwest London, on July 29, 2012 during the London 2012 Olympic Games. AFP PHOTO/ MIGUEL MEDINA

French guard Tony Parker (L) shoots during the Men's Preliminary Round Group A match United States vs France at the London 2012 Olympic Games , on July 29, 2012 in London. AFP PHOTO / POOL / MARK RALSTON

Scott Parsons of the US competes in the kayak single men's 2nd round on July 29, 2012 at " Lee Valley Water Park", in London during the London 2012 Olympic Games. AFP PHOTO OLIVIER MORIN