French guard Tony Parker (L) and centre Kevin Seraphin (R) attend their London 2012 Olympic Games men's preliminary round group A basketball match against Tunisia in London on August 4, 2012 at the basketball arena in London. AFP PHOTO / MARK RALSTON

French guard Tony Parker falls to the ground during his team's London 2012 Olympic Games men's preliminary round group A basketball match against Tunisia in London on August 4, 2012. AFP PHOTO / MARK RALSTON

Central African Republic's Berenger Aymard Bosse (2L) competes in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ANTHONIN THUILLIER

South Africa's Oscar Pistorius competes in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

(From L) Jamaica's Rusheen McDonald, Dominican Republic's Luguelin Santos, South Africa's Oscar Pistorius and Russia's Maksim Dyldin compete in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

South Africa's Oscar Pistorius gives a thumbs-up after competing in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

South Africa's Oscar Pistorius arrives to compete in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

Spectators watch the rowing event of the London 2012 Olympic Games, as rain falls over Eton Dorney Rowing Centre in Eton, west of London, on August 4, 2012. AFP PHOTO / DAMIEN MEYER

South Korea's Jung Hyojung (L) fences against Romania's Ana Maria Branza during the women's epee Team quarterfinals as part of the fencing event of London 2012 Olympic games, on August 4, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

French forward Nicolas Batum (front) is challenged by Tunisian guard Amine Rzig during their London 2012 Olympic Games men's preliminary round group A basketball match in London on August 4, 2012. France won the match 73-69. AFP PHOTO / TIMOTHY A. CLARY

South Africa's Oscar Pistorius (R) competes in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

South Africa's double amputee athlete Oscar Pistorius takes the start of the men's 400m heats at the athletics event during the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

South Africa's double amputee athlete Oscar Pistorius takes the start of the men's 400m heats at the athletics event during the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

South Africa's double amputee athlete Oscar Pistorius reacts after competing in the men's 400m heats at the athletics event during the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

Poland's Karolina Tyminska competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Poland's Karolina Tyminska competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Poland's Karolina Tyminska competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

South Africa's double amputee athlete Oscar Pistorius takes the start of the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. Pistorius made Olympic athletics history on August 4 when he became the first double amputee to competed in an athletics event. AFP PHOTO / GABRIEL BOUYS

French guard Tony Parker celebrates after defeating Tunisia in their London 2012 Olympic Games men's preliminary round group A basketball match in London on August 4, 2012. France won the match 73-69. AFP PHOTO / MARK RALSTON

French guard Tony Parker celebrates after defeating Tunisia in their London 2012 Olympic Games men's preliminary round group A basketball match in London on August 4, 2012. France won the match 73-69. AFP PHOTO / MARK RALSTON

A photo shows a close-up of South Africa's double amputee athlete Oscar Pistorius' blades prior to the start of the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. Pistorius made Olympic athletics history on August 4 when he became the first double amputee to competed in an athletics event. AFP PHOTO / GABRIEL BOUYS

Latvia's Laura Ikauniece competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Sulette Damons of South Africa (Foreground) is tackled by Georgia Nanscawen of Australia during the women's field hockey preliminary round match between Australia and South Africa at the Riverbank Arena in London, on August 4, 2012, during the London 2012 Olympic Games. AFP PHOTO/ INDRANIL MUKHERJEE

China's Xue Chen and Zhang Xi (R) celebrate at the end of the women's Beach Volleyball round of 16 match against Russia's Ekaterina Khomyakova and Evgenya Ukolova on Centre Court Stadium in Horse Guards Parade in London on August 4, 2012, during the London 2012 Olympic Games. AFP PHOTO / DANIEL GARCIA

Denmark's Mathias Boe and Carsten Mogensen celebrate their victory over Chung Jae Sung and Lee Yong Dae of South Korea during the semi-final men's doubles badminton match at the London 2012 Olympic Games in London on August 4, 2012. AFP PHOTO /ADEK BERRY

US' Lashawn Merritt walks on the track after pulling up from the men's 400m heats at the athletics event during the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

US' Lashawn Merritt (R) talks to a volunteer before applying ice on his leg after pulling up from the men's 400m heats at the athletics event during the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Portugal's Maria Leonor Tavares competes in the women's pole vault qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCK FIFE

(From L) Britain's Martyn Rooney, Dominica's Erison Hurtault, Poland's Marcin Marciniszyn and Belgium's Kevin Borlee compete in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

(From L) Britain's Martyn Rooney, Dominica's Erison Hurtault, Poland's Marcin Marciniszyn and Belgium's Kevin Borlee compete in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

(From L) Britain's Martyn Rooney, Dominica's Erison Hurtault, Poland's Marcin Marciniszyn and Belgium's Kevin Borlee compete in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

(From L) Britain's Martyn Rooney, Dominica's Erison Hurtault, Poland's Marcin Marciniszyn and Belgium's Kevin Borlee compete in the men's 400m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Karolina Tyminska competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

This multiple exposure image shows Denis Dmitriev of Russia (L) and Poland's Damian Zielinski (R) competing in the men's omnium competition in the velodrome at the Olympic park at the 2012 olympic games in London on August 4, 2012. AFP PHOTO / ODD ANDERSEN

(L-R) Great Britain's Alex Gregory, Pete Reed, Tom James and Andrew Triggs Hodge celebrate after winning the gold medal in the men's four final A of the rowing event during the London 2012 Olympic Games, at Eton Dorney Rowing Centre in Eton, west of London, on August 4, 2012. AFP PHOTO / DAMIEN MEYER

US sprint cyclist Jimmy Watkins is pictured prior to the sprint qualifying round as part of the track cycling event of the London 2012 Olympic Games at the Veldorome in the Olympic Park in East London on August 4, 2012. AFP PHOTO / CARL DE SOUZA

Ukraine's Valentyna Horpynych Zhudina rests on the ground after competing in the women's 3000m steeplechase heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Britain's Jessica Ennis competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

China's Li Zhenzhu (C) competes in the women's 3000m steeplechase heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCK FIFE

Australia's Genevieve Lacaze competes in the women's 3000m steeplechase heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCK FIFE

Triathlon competitors ride around the Victoria Memorial in front of the Buckinham Palace during the women's triathlon event at the 2012 Olympic Games in London on August 4, 2012. Switzerland's Nicola Spirig won the competition. AFP PHOTO / POOL/ EMMANUEL DUNAND

Triathlon competitors dive at the start of the women's triathlon event at the 2012 Olympic Games in London on August 4, 2012. Switzerland's Nicola Spirig won the competition. AFP PHOTO / FABRICE COFFRINI

Portugal's Clarisse Cruz competes in the women's 3000m steeplechase heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ERIC FEFERBERG

Japan's Kensuke Nagai (L) scores past Egypt's goalkeeper Ahmed Al-Shenawi (C) and Egypt's defender Saadeddine Saad (R) during the London 2012 Olympic men's football quarter final match between Japan and Egypt at Old Trafford in Manchester, north-west England, on August 4, 2012. AFP PHOTO/PAUL ELLIS

Multiexposure picture shows athletes competing in the women's 3000m steeplechase heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / JEWEL SAMAD

US' Tyson Gay (C) crosses the finish line ahead of Trinidad and Tobago's Richard Thompson (R) and Zambia's Gerald Phiri in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Bartosz Kurek celebrates winning a point during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO / KIRILL KUDRYAVTSEV

Poland's Lukasz Zygadlo (L) celebrates winning a point during the Men's preliminary pool A volleyball match between Great Britain and Poland at the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Oluwadamilola Bakare spikes as Poland's Bartosz Kurek (L) attempts to block during the Men's preliminary pool A volleyball match between Great Britain and Poland AT the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO / KIRILL KUDRYAVTSEV

US' Justin Gatlin (2ndR) crosses the finish line as he competes with (from L) Poland's Dariusz Kuc, Japan's Masashi Eriguchi, Bahamas' Derrick Atkins, Trinidad and Tobago's Rondel Sorrillo and Oman's Barakat Mubarak al-Harthi competes with Bahamas' Derrick Atkins (L) and Trinidad and Tobago's Rondel Sorrillo in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Poland's Karolina Tyminska competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

(L/R) Australia's Erin Densham, Switzerland's Nicola Spirig, Sweden's Lisa Norden, Britain's Helen Jenkins and Spain's Ainhoa Murua run during the women's triathlon at Hyde Park duriing the 2012 Olympic Games in London on August 4, 2012. Switzerland's Nicola Spirig won the Olympic women's triathlon from Sweden's Lisa Norden after a dramatic photo finish. AFP PHOTO / FABRICE COFFRINI

Jamaica's Usain Bolt gestures towards Britain's James Dasaolu after competing in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / OLIVIER MORIN

Jamaica's Usain Bolt and Nigeria's Ogho-Oghene Egwero (L) compete in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / JEWEL SAMAD

Poland's players celebrate after winning a point during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's players led by Michal Kubiak (2R) celebrate winning a point during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Marcin Mozdzonek (L), Bartosz Kurek (C) and Zbigniew Bartman (R) react during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Marcin Mozdzonek (C), Bartosz Kurek (L) and Zbigniew Bartman (R) react during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's players including Peter Bakare (R) react during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Oluwadamilola Bakare (top) and Ben Pipes attempt to set during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Oluwadamilola Bakare (L) attempts to set during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Bartosz Kurek reacts during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's players celebrate winning a point during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Marcin Mozdzonek (C) and Zbigniew Bartman (R) react speak to the umpire during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Nathan French attempts to set during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Nathan French attempts to set during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark McGivern reacts during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark McGivern (R) reacts during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark McGivern reacts during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Michal Kubiak reacts during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Nathan French reacts during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark McGivern (top) and Oluwadamilola Bakare attempt to block during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Spain's forward Pau Gasol leaves the court after losing to Russia in their London 2012 Olympic Games men's preliminary round group B basketball match in London on August 4, 2012. Russia won the match 77-74. AFP PHOTO / MARK RALSTON

Jamaica's Asafa Powell (L) and Churandy Martina of The Netherlands compete in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS

Jamaica's Asafa Powell is seen after the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / JEWEL SAMAD

Poland's Lukasz Zygadlo (R) gives a pass during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Fans react during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark McGivern (R) and Oluwadamilola Bakare (L) attempt to block as Poland's Bartosz Kurek looks on during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Lukasz Zygadlo (R) gives a pass during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark Plotyczer (R) spikes as Poland's Lukasz Zygadlo (L), Grzegorz Kosok (2L) and Bartosz Kurek attempt to block during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Kirill Skachkov of Russia eyes the ball as he serves to China's Zhang Jike during a table tennis men's team match of the London 2012 Olympic Games at the Excel centre in London on August 4, 2012. AFP PHOTO / Saeed Khan

Britain's Oluwadamilola Bakare (R) spikes as Poland's Lukasz Zygadlo (L), Grzegorz Kosok (2L) and Bartosz Kurek attempt to block during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Nathan French (L) spikes as Poland's Lukasz Zygadlo (C) and Grzegorz Kosok (R) attempt to block during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark Plotyczer (L) spikes as Poland's Marcin Mozdzonek (C) and Zbigniew Bartman (R) attempt to block during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Mark McGivern (L) spikes as Poland's Marcin Mozdzonek and Michal Kubiak (C) attempt to block during the Men's preliminary pool A volleyball match between Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Britain's Ben Pipes (L) spikes as Poland's Marcin Mozdzonek attempts to block during the Men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO / KIRILL KUDRYAVTSEV

(LtoR) Sarah Groff of the US, Spain's Ainhoa Murua, Australia's Emma Jackson and New Zealand's Andrea Hewitt run with their name written on their back during the women's triathlon event at Hyde Park at the 2012 Olympic Games in London on August 4, 2012. AFP PHOTO / FABRICE COFFRINI

Britain's Dwain Chambers competes in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ERIC FEFERBERG

The Netherlands players form a huddle as they listen to coach M Caldas (seated, wearing a cap) after the women's field hockey preliminary round match between Netherlands and South Korea at the Riverbank Arena in London on August 4, 2012 during the London 2012 Olympic Games. AFP PHOTO / INDRANIL MUKHERJEE

Britain's Holly Bleasdale competes in the women's pole vault qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCK FIFE

Russia's Yelena Sidorchenkova Orlova, Poland's Katarzyna Kowalska and Tunisia's Habiba Ghribi competes in the women's 3000m steeplechase heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / JOHANNES EISELE

South Korean players react after being defeated by the Netherlands during the women's field hockey preliminary round match between the Netherlands and South Korea at the Riverbank Arena in London on August 4, 2012 during the London 2012 Olympic Games. AFP PHOTO / INDRANIL MUKHERJEE

Egypt players (Upper L-R) Mohamed Aboutrika, Saadeldin Saad, Ahmed Hegazi, Ahmed Fathi Ibrahim, Emad Ibrahim Mohamed Abdel Naby and Mohamed Salah Ghaly, (Lower L-R) Mohamed El Neny, Shehab Ahmed, Ahmed Elshenawi, Eslam Ramadan, Hossam Hassan Mohamed Abdalla, line up before the London 2012 Olympic men's football quarter final match between Japan and Egypt at Old Trafford in Manchester, north-west England, on August 4, 2012. AFP PHOTO/PAUL ELLIS

Britain's Andy Murray speaks with his teammate Laura Robson during their quarter final match against Australia's Samantha Stosur vs. Lleyton Hewitt as part of the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on August 3, 2012. AFP PHOTO / MARTIN BERNETTI

US fencer Maya Lawrence (L) fences against South Korea's Jung Hyojung during the women's epee Team semifinals as part of the fencing event of London 2012 Olympic games, on August 4, 2012 at the ExCel centre in London. AFP PHOTO / TOSHIFUMI KITAMURA

Russia's Elena Isinbaeva competes in the women's pole vault qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / JEWEL SAMAD

Canada's Paula Findlay is comforted by a coach after finishing the women's triathlon event at Hyde Park at the 2012 Olympic Games in London on August 4, 2012. AFP PHOTO / FABRICE COFFRINI

Jamaica's Usain Bolt gestures before competing in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCK FIFE

Picture taken with a robotic camera New Zealand's Sarah Cowley competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

Picture taken with a robotic camera Britain's Louise Hazel competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

PICTURE TAKEN WITH A ROBOTIC CAMERA Britain's Jessica Ennis competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

PICTURE TAKEN WITH A ROBOTIC CAMERA Poland's Karolina Tyminska competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCOIS XAVIER MARIT

Czech Republic's Adela Sykorova competes in the 50m rifle 3 positions women final at the London 2012 Olympic Games at the Royal Artillery Barracks in London, August 04, 2012. AFP PHOTO/MARWAN NAAMANI

Poland's Sylwia Bogacka competes in the 50m rifle 3 positions women final at the London 2012 Olympic Games at the Royal Artillery Barracks in London on August 4, 2012. AFP PHOTO/MARWAN NAAMANI

TOPSHOTS Russia's forward Andrey Kirilenko (R) challenges Spain's forward Pau Gasol during their London 2012 Olympic Games men's preliminary round group B basketball match in London on August 4, 2012. AFP PHOTO / TIMOTHY A. CLARY

TOPSHOTS Poland's Karolina Tyminska competes in the women's heptathlon long jump qualifications at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

TOPSHOTS US' Tyson Gay competes in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / ADRIAN DENNIS

Russia's Maria Sharapova (L) and Serena Williams of the US pose prior to their final tennis match as part of the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on August 3, 2012. AFP PHOTO / LUIS ACOSTA

US forward Kevin Love falls to the ground during his team's London 2012 Olympic Games men's preliminary round group A basketball match against Lithuania in London on August 4, 2012. AFP PHOTO / TIMOTHY A. CLARY

Britain's Nick Skelton on Big Star competes in the first Individual Show Jumping qualifier of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London on August 4, 2012. AFP PHOTO / JOHN MACDOUGALL

Germany's Marcus Ehning on Plot Blue competes in the first Individual Show Jumping qualifier of the 2012 London Olympics at the Equestrian venue in Greenwich Park, London on August 4, 2012. AFP PHOTO / JOHN MACDOUGALL

China's Li Xuerui lies on the court after chasing a return from compatriot Wang Yihan in their gold medal women's singles badminton match at the London 2012 Olympic Games in London, on August 4, 2012. AFP PHOTO / ADEK BERRY

Sweden's centreback Dalibor Doder jumps to shoot during the men's preliminary Group A handball match Sweden vs Argentina for the London 2012 Olympics Games on August 4, 2012 at the Copper Box hall in London. AFP PHOTO/ JAVIER SORIANO

Spain's Elsa Baquerizo crashes with teammate Liliana Baquerizo during the women's Beach Volleyball round of 16 match against Italy's Marta Menegatti and Greta Cicolari on Centre Court Stadium in Horse Guards Parade in London on August 4, 2012, during the London 2012 Olympic Games. AFP PHOTO / DANIEL GARCIA

Belgium's Lieselotte Van Lindt looks on during a penalty corner during the women's field hockey preliminary round match between Japan and Belgium at the Riverbank Arena in London on August 4, 2012 during the London 2012 Olympic Games. AFP PHOTO / INDRANIL MUKHERJEE

Spain's Elsa Baquerizo gets up while teammate Liliana Baquerizo smiles after the crash duringt the women's Beach Volleyball round of 16 match against Italy's Marta Menegatti and Greta Cicolari on Centre Court Stadium in Horse Guards Parade in London on August 4, 2012, during the London 2012 Olympic Games. AFP PHOTO / DANIEL GARCIA

Serena Williams of the US celebrates her victory over Russia's Maria Sharapova at the end of their final tennis match as part of the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on August 4, 2012. Williams won 6-0, 6-1. AFP PHOTO / MARTIN BERNETTI

Serena Williams of the US celebrates her victory over Russia's Maria Sharapova at the end of their final tennis match as part of the 2012 London Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on August 4, 2012. Williams won 6-0, 6-1. AFP PHOTO / MARTIN BERNETTI

Britain's players react during the men's preliminary pool A volleyball match between Great Britain and Poland in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Italy's Ivan Zaytsev (C) spikes as Australia's Harrison Peacock (L), Travis Passier (2L) and Adam White (2R) attempt to block during the Men's preliminary pool A volleyball match between Australia and Italy in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

A kangaroo mascot sits on the sidelines during the Men's preliminary pool A volleyball match between Australia and Italy in the 2012 London Olympic Games in London on August 4, 2012. AFP PHOTO/KIRILL KUDRYAVTSEV

Poland's Tomasz Bernard Zielinski competes during the men's 94kg group B weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 4, 2012. AFP PHOTO / YURI CORTEZ

Poland's Tomasz Bernard Zielinski competes during the men's 94kg group B weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 4, 2012. AFP PHOTO / YURI CORTEZ

Belarus's team competes in the women's 3000m team pursuit as part of the track cycling event of the London 2012 Olympic Games at the Velodrome in the Olympic Park in East London on August 4, 2012. AFP PHOTO / ODD ANDERSEN

Germany's team gets ready to compete in the women's 3000m team pursuit as part of the track cycling event of the London 2012 Olympic Games at the Velodrome in the Olympic Park in East London on August 4, 2012. AFP PHOTO / ODD ANDERSEN

Great Britain's team competes in the women's 3000m team pursuit as part of the track cycling event of the London 2012 Olympic Games at the Velodrome in the Olympic Park in East London on August 4, 2012. AFP PHOTO / LEON NEAL

TOPSHOTS Everton dos Santos Lopes (L) of Brazil defends against Roniel Iglesias Sotolongo (R) of Cuba during their round of 16 Light-Welterweight (64kg) match of the London 2012 Olympic Games at the ExCel Arena on August 4, 2012 in London. Iglesias Sotolongo was awarded an 18-15 points decision. AFP PHOTO / Jack GUEZ

Poland's Tomasz Bernard Zielinski competes during the men's 94kg group B weightlifting event of the London 2012 Olympic Games at The Excel Centre in London on August 4, 2012. AFP PHOTO / YURI CORTEZ