Sweden's Lassi Karonen reacts at the end of the men's rowing single in Eton Dorney, near Windsor, England, at the 2012 Summer Olympics, on Aug 3, 2012. AFP PHOTO / KIRSTY WIGGLESWORTH

Gold medalist France's Teddy Riner celebrates after winning the men's +100kg judo contest of the London 2012 Olympic Games on August 3, 2012 at the ExCel arena in London. AFP PHOTO / EMMANUEL DUNAND

Denmark's Nathalie zu Zayn-Wittgenstein waves after competing in the Dressage preliminaries of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London, on August 3, 2012. AFP PHOTO / JOHN MACDOUGALL

Bronze medalist China's Ding Feng competes in the 25m rapid fire pistol men final at the London 2012 at the Royal Artillery Barracks in London on August 3, 2012. AFP PHOTO/MARWAN NAAMANI

World champion Russia's Alexei Klimov competes in the 25m rapid fire pistol men final at the London 2012 at the Royal Artillery Barracks in London on August 3, 2012. Klimov finished in the fourth place despite having shot a perfect score of 600 in the qualifying round as Cuba's Leuris Pupo gave his country's the first gold medal in the games. AFP PHOTO/MARWAN NAAMANI

Poland's Ewa Mizdal competes during the women's 75kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 3, 2012. AFP PHOTO / YURI CORTEZ

Poland's Katarzyna Milczarek on Ekwador competes in the Dressage preliminaries of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London on August 3, 2012. AFP PHOTO / CARL COURT.

US' Peter Steffen on Ravel waves after competing in the Dressage preliminaries of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London, on August 3, 2012. AFP PHOTO / JOHN MACDOUGALL

Poland's Katarzyna Milczarek on Ekwador competes in the Dressage preliminaries of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London on August 3, 2012. AFP PHOTO / CARL COURT.

Brazil's leftwing Fernanda Silva Rocha shoots during the women's preliminary Group A handball match Russia vs Brazil for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

World champion Russia's Alexei Klimov gestures as he competes in the 25m rapid fire pistol men final at the London 2012 at the Royal Artillery Barracks in London, August 3, 2012. Klimov finished in the fourth place despite having shot a perfect score of 600 in the qualifying round as Cuba's Leuris Pupo gave his country's the first gold medal in the games. AFP PHOTO / MARWAN NAAMANI

Kazakhstan's Svetlana Podobedova celebrates after winning the gold medal during the women's 75kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 3, 2012. AFP PHOTO / YURI CORTEZ

Kazakhstan's Svetlana Podobedova competes to win the gold medal during the women's 75kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 3, 2012. AFP PHOTO / YURI CORTEZ

Visitors look on during the Dressage preliminaries of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London, on August 3, 2012. AFP PHOTO / CARL COURT

France's Marion Farissier competes in the preliminary round of the women's 3m springboard diving event at the London 2012 Olympic Games in the Aquatics Centre in London on August 3, 2012. AFP PHOTO / FABRICE COFFRINI

Russia's leftwing Emiliia Turei (R) jumps to shoot past Brazil's leftwing Fernanda Silva Rocha during the women's preliminary Group A handball match Russia vs Brazil for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

US Serena Williams servesagainst Belarus' Victoria Azarenka during their women's singles semifinal round match at the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on August 3, 2012. AFP PHOTO/ Martin Bernetti

Bronze medalist China's Ding Feng concentrates during competition in the 25m rapid fire pistol men final at the London 2012 at the Royal Artillery Barracks in London, on August 3, 2012. AFP PHOTO / MARWAN NAAMANI

Russia's Nadezda Bazhina competes in the preliminary round of the women's 3m springboard diving event at the London 2012 Olympic Games in the Aquatics Centre in London on August 3, 2012. AFP PHOTO / FABRICE COFFRINI

Mexico's Laura Sanchez Soto competes in the preliminary round of the women's 3m springboard diving event at the London 2012 Olympic Games in the Aquatics Centre in London on August 3, 2012. AFP PHOTO / FABRICE COFFRINI

Britain's Hannah Starling competes in the preliminary round of the women's 3m springboard diving event at the London 2012 Olympic Games in the Aquatics Centre in London on August 3, 2012. AFP PHOTO / FABRICE COFFRINI

Brazil's centreback Ana Paula Rodrigues reacts as she lies on the floor during the women's preliminary Group A handball match Russia vs Brazil for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

US player Serena Williams returns the ball against Belarus' Victoria Azarenka during their women's singles semifinal round match at the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on August 3, 2012. AFP PHOTO/ Martin Bernetti

Britain's Victoria Pendelton prepares to compete in the London 2012 Olympic Games women's Keirin track cycling event at the Veldorome in the Olympic Park in East London on August 3, 2012. AFP PHOTO / ODD ANDERSEN

Japan's coach Norio Sasaki gestures before the London 2012 Olympic Games women's quarter-final football match between Brazil women and Japan women at the Millennium Stadium in Cardiff, Wales on August 3, 2012. AFP PHOTO / GLYN KIRK

Egypt's Khalil Mahmoud K Abir Abdelrahman falls with the weight in a failed attempt during the women's 75kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 3, 2012. AFP PHOTO / YURI CORTEZ

China's He Zi competes in the preliminary round of the women's 3m springboard diving event at the London 2012 Olympic Games in the Aquatics Centre in London on August 3, 2012. AFP PHOTO / MARTIN BUREAU

Russia's Nadezda Bazhina competes in the preliminary round of the women's 3m springboard diving event at the London 2012 Olympic Games in the Aquatics Centre in London on August 3, 2012. AFP PHOTO / MARTIN BUREAU

Bulgaria's Ivet Lalova reacts after competing in the women's 100m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Bulgaria's Ivet Lalova reacts after competing in the women's 100m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Bulgaria's Ivet Lalova competes in the women's 100m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

New Zealand's Jo Aleh and Olivia Powrie compete in the women's 470 sailing class at the London 2012 Olympic Games, in Weymouth on August 3, 2012. AFP PHOTO/William WEST

Poland's Karolina Tyminska competes in the women's heptathlon shot put at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ADRIAN DENNIS

US swimmer Missy Franklin reacts after winning gold and breaking the world record in the women's 200m backstroke final during the swimming event at the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / LEON NEAL

Lithuania's Austra Skujyte competes in the women's heptathlon shot put at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Brazil's Rosangela Santos competes in the women's 100m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Spain's goalkeeper Silvia Navarro Jimenez tries to make a save during the women's preliminary Group B handball match Spain vs Sweden for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

US swimmer Michael Phelps reacts after winning the men's 100m butterfly final next to South Africa's Chad Le Clos during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. AFP PHOTO / MARTIN BUREAU

France's Michael LLodra and Jo-Wilfred Tsonga (L) celebrate their victory over Spain's David Ferrer and Lopez during their men's Double tennis match Semi-Final at the London 2012 Olympic Games in London on August 3, 2012. AFP PHOTO/Luis Acosta

Jamaica's Allison Randall competes in the women's discus throw qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

US swimmer Michael Phelps reacts after he competed in the men's 100m butterfly final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. He won gold. AFP PHOTO / FABRICE COFFRINI

Poland's Zaneta Glanc competes in the women's discus throw qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Russia's Darya Pishchalnikova competes in the women's discus throw qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Jamaica's Kerron Stewart reacts after competing in the women's 100m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Kerron Stewart competes in the women's 100m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

US swimmer Michael Phelps adjusts his swimming cap prior to competes in the men's 100m butterfly final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. He won gold. AFP PHOTO / FABRICE COFFRINI

Ivory Coast's Murielle Ahoure reacts after competing in the women's 100m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Adrian Edward Zielinski competes during men's 85kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 3, 2012. AFP PHOTO / YURI CORTEZ

Poland's Adrian Edward Zielinski competes during the men's 85kg group A weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 3, 2012. AFP PHOTO / YURI CORTEZ

-PICTURE TAKEN WITH A ROBOTIC CAMERA- Armenia's Vardan Pahlevanyan competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / CHRISTOPHE LESOURD

France's Florent Manaudou reacts after winning gold in the men's 50m freestyle final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. AFP PHOTO / FABRICE COFFRINI

France's Florent Manaudou celebrates after winning gold in the men's 50m freestyle final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. AFP PHOTO / CHRISTOPHE SIMON

France's Florent Manaudou celebrates after winning gold in the men's 50m freestyle final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. AFP PHOTO / LEON NEAL

Athletes compete in the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ERIC FEFERBERG

Lithuania's Povilas Mykolaitis competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Saudi Arabia's Mohammed Shaween reacts after competing in the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ERIC FEFERBERG

Spain's Diego Ruiz (C) falls during in the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Senegal's Ndiss Kaba Badji competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Spain's Diego Ruiz (C) falls during in the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Spain's Diego Ruiz (C) falls during in the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Spain's Diego Ruiz (C) falls during in the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Spain's Diego Ruiz (L) and Germany's Carsten Schlangen (R) lay on the field after the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Sweden's Jorgen Persson serves to Timo Boll (R) of Germany during a table tennis men's team match of the London 2012 Olympic Games at the Excel centre in London on August 3, 2012. AFP PHOTO / Saeed Khan

Sweden's Jorgen Persson serves to Timo Boll (R) of Germany during a table tennis men's team match of the London 2012 Olympic Games at the Excel centre in London on August 3, 2012. AFP PHOTO / Saeed Khan

PICTURE TAKEN WITH A ROBOTIC CAMERA US swimmer Missy Franklin competes in the women's 200m backstroke final during the swimming event at the London 2012 Olympic Games on August 3, 2012 in London. She won gold. AFP PHOTO / FRANCOIS XAVIER MARIT

-PICTURE TAKEN WITH A ROBOTIC CAMERA- Greece's Louis Tsatoumas in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / CHRISTOPHE LESOURD

PICTURE TAKEN WITH AN UNDERWATER CAMERA US swimmer Michael Phelps competes in the men's 100m butterfly final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. He won gold. AFP PHOTO / FRANCOIS XAVIER MARIT

Spain's Diego Ruiz (L) and Germany's Carsten Schlangen (R) lay on the field after the men's 1500m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

Britain's Andy Murray celebrates victory during his men's singles semifinal round match against Serbian's Novak Djokovic at the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on August 3, 2012. AFP PHOTO/ Martin Bernetti

General view shows the Olympic Stadium in London during the London 2012 Olympic Games athletics event on August 3, 2012. AFP PHOTO / JEWEL SAMAD

Paul Quemada (L) Miquel Delas (2L) and Roc Oliva (R) of Spain (C) attempt to tackle Lloyd Madsen of South Africa (C) during the men's field hockey preliminary round match between South Africa and Spain at the Riverbank Arena in London on August 3, 2012, during the London 2012 Olympic Games. AFP PHOTO/ INDRANIL MUKHERJEE

France's Laure Manaudou (R) reacts after her brother Florent won the men's 50m freestyle final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. AFP PHOTO / MARTIN BUREAU

Germany's David Storl celebrates during the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Karolina Tyminska (L) competes in the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Karolina Tyminska (L) competes in the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Karolina Tyminska competes in the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

This multi exposure picture shows players competing during the women's preliminary round group B basketball match France vs Great Britain of the London 2012 Olympic Games on August 3, 2012 at the basketball arena in London. AFP PHOTO / MARK RALSTON

South Korea's team celebrates winning gold in the men's sabre team as part of the fencing event of London 2012 Olympic games, on August 3, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Great Britain's Paul Drinkhall competes against Portugal's Marcos Freitas during a table tennis men's team match of the London 2012 Olympic Games at the Excel center in London on August 3, 2012. AFP PHOTO/Emmanuel Dunand

China's Li Jinzhe competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

British forward Temi Fagbenle jumps to score during the women's preliminary round group B basketball match France vs Great Britain of the London 2012 Olympic Games on August 3, 2012 at the basketball arena in London. POOL AFP PHOTO / MARK RALSTON

Spain's leftwing Vanessa Amoros Quiles (L) and teammates celebrate their victory over Sweden at the end of the women's preliminary Group B handball match Spain vs Sweden for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. Spain won 25-24. AFP PHOTO/ JAVIER SORIANO

Portugal's Marcos Chuva competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Mexico's Luis Rivera competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Britain's Louise Hazel celebrates after the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ERIC FEFERBERG

Bahamas' Raymond Higgs competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Britain's Louise Hazel blows a kiss after competing in the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Spain's rightwing Carmen Martin Berenguer reacts to their victory over Sweden at the end of the women's preliminary Group B handball match Spain vs Sweden for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. Spain won 25-24. AFP PHOTO/ JAVIER SORIANO

Sweden's pivot Johanna Wiberg reacts after being defeated by Spain at the end of the women's preliminary Group B handball match Spain vs Sweden for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. Spain won 25-24. AFP PHOTO/ JAVIER SORIANO

Switzerland's Ellen Sprunger celebrates after competing in the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / OLIVIER MORIN

TOPSHOTS Victoria Pendleton sends a message of love to her boyfriend Scott Gardener from the podium at the velodrome in the Olympic park at the 2012 Olympic games in London on August 3, 2012. AFP PHOTO / ODD ANDERSEN

Canada's defender Carmelina Moscato (R) runs past Britain's midfielder Jill Scott during the London 2012 Olympic Games women's football quarter final match between Britain and Canada on August 3, 2012 at The City of Coventry Stadium in Coventry, central England. AFP PHOTO/PAUL ELLIS

US swimmer Michael Phelps competes in the men's 100m butterfly final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. He won gold. AFP PHOTO / MARTIN BUREAU

TOPSHOTS France's Florent Manaudou sticks his tongue out after winning gold in the men's 50m freestyle final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. AFP PHOTO / FABRICE COFFRINI

Poland's Tomasz Majewski competes in the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JOHANNES EISELE

Poland's Tomasz Majewski celebrates while competing in the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JOHANNES EISELE

TOPSHOTS Great Britain fans wearing masks of (from L) Britain's William and Catherine, Duke and Duchess of Cambridge, and Queen Elizabeth gesture from the stands the 2012 Olympic women's football quarter final match between Great Britain and Canada on August 3, 2012 at The City of Coventry Stadium in Coventry, central England. AFP PHOTO / PAUL ELLIS

US' Lindsey Berg (front) gives a pass during the Women's preliminary pool B volleyball match between the USA and Serbia at the 2012 London Olympic Games in London on August 3, 2012. AFP PHOTO / KIRILL KUDRYAVTSEV

India's Krishna Poonia competes in the women's discus throw qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

China's Deng Daokun and Wang Weidong compete in the men's 470 sailing class at the London 2012 Olympic Games, in Weymouth on August 3, 2012. AFP PHOTO/William WEST

A fan of Norway's handball team looks on ahead of the women's preliminary Group B handball match Denmark vs Norway for the London 2012 Olympics Games on August 3, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

South Korea's Won Woo Young (L) fences against Romania's Rares Dumitrescu in the last bout of the men's sabre team as part of the fencing event of London 2012 Olympic games, on August 3, 2012 at the ExCel centre in London. South Korea won the Olympic Games men's team sabre fencing gold medal on Friday, beating Romania 45-26 in the final. AFP PHOTO / ALBERTO PIZZOLI

Britain's Jessica Ennis (L) and Britain's Katarina Johnson-Thompson (R) compete in the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ERIC FEFERBERG

Germany's Nadine Muller competes in the women's discus throw qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

PICTURE TAKEN WITH AN UNDERWATER CAMERA Brazil's Cesar Cielo competes in the men's 50m freestyle final during the swimming event at the London 2012 Olympic Games at the Olympic Park on August 3, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

Britain's Jessica Ennis competes in the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

A member of the staff pulls a shots storage trolley during the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JOHANNES EISELE

(From L) Canada's forward Melissa Tancredi, Canada's goalkeeper Karina LeBlanc, Canada's forward Jonelle Filigno, Canada's Melanie Booth and Canada's midfielder Kelly Parker celebrate winning 2-0 after the 2012 Olympic women's football quarter final match between Great Britain and Canada on August 3, 2012 at The City of Coventry Stadium in Coventry, central England. AFP PHOTO / PAUL ELLIS

Werner Schlager of Austria watches the ball as he returns a shot to Ahmed Saleh of Egypt during their table tennis men's team match of the London 2012 Olympic Games at The Excel Centre in London on August 3, 2012. AFP PHOTO / SAEED KHAN

A Britain's supporter cheers Britain's Jessica Ennis during the women's heptathlon 200m heats at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ERIC FEFERBERG

US swimmer Katie Ledecky reacts after she won gold in the women's 800m freestyle final during the swimming event at the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / MARTIN BUREAU

US swimmer Katie Ledecky reacts after she won gold in the women's 800m freestyle final during the swimming event at the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FABRICE COFFRINI

China's Tan Jian competes in the women's discus throw qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Athletes compete in the women's 10,000m final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JEWEL SAMAD

A multi exposure picture shows athletes competing in the women's 10,000m final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Belarus' Sviatlana Siarova competes in the women's discus throw qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Poland's Tomasz Majewski celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Poland's Tomasz Majewski celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / FRANCK FIFE

Poland's Tomasz Majewski celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Tomasz Majewski (C) celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Tomasz Majewski (C) celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / GABRIEL BOUYS

(From L) Canada's midfielder Chelsea Stewart, Canada's defender Robyn Gayle, Canada's midfielder Brittany Timko, Canada's forward Jonelle Filigno, Canada's midfielder Kelly Parker and Canada's defender Melanie Booth celebrate winning 2-0 after the 2012 Olympic women's football quarter final match between Great Britain and Canada on August 3, 2012 at The City of Coventry Stadium in Coventry, central England. AFP PHOTO / PAUL ELLIS

TOPSHOTS - PICTURE TAKEN WITH A ROBOTIC CAMERA- Greece's Louis Tsatoumas in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / CHRISTOPHE LESOURD

Poland's Tomasz Majewski celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JOHANNES EISELE

Poland's Tomasz Majewski celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JOHANNES EISELE

Poland's Tomasz Majewski celebrates after winning the men's shot put final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JOHANNES EISELE

TOPSHOTS Lithuania's Povilas Mykolaitis competes in the men's long jump qualifying rounds at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / ADRIAN DENNIS

TOPSHOTS Athletes run past the Olympic Flame as they compete in the women's 10,000m final at the athletics event during the London 2012 Olympic Games on August 3, 2012 in London. AFP PHOTO / JEWEL SAMAD