View of the footwear worn by silver medallists Andrea Hlavackova (L) and Lucie Hradecka of the Czech Republic during the medal presentation ceremony for the women's doubles tennis at the All England Lawn Tennis Club during the London 2012 Olympic Games August 5, 2012. REUTERS/Stefan Wermuth (BRITAIN - Tags: OLYMPICS SPORT TENNIS)

Silver medallists Andrea Hlavackova and Lucie Hradecka (L) of the Czech Republic walk with their medals during the presentation ceremony for the women's doubles tennis at the All England Lawn Tennis Club during the London 2012 Olympic Games August 5, 2012. REUTERS/Stefan Wermuth (BRITAIN - Tags: OLYMPICS SPORT TENNIS)

Todd Rogers of the U.S. returns a shot during their men's preliminary round beach volleyball match against Spain at the London 2012 Olympic Games at Horse Guards Parade July 31, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: SPORT OLYMPICS SPORT VOLLEYBALL)

Todd Rogers of the U.S. digs the ball against Czech Republic's Premysl Kubala and Petr Benes during their men's preliminary round beach volleyball match at Horse Guards Parade during the London 2012 Olympic Games August 2, 2012. REUTERS/Dominic Ebenbichler (BRITAIN - Tags: OLYMPICS SPORT VOLLEYBALL)

Members of the U.S. team pose for a photo before the women's cycling road race final at the London 2012 Olympic Games July 29, 2012. REUTERS/Phil Noble (BRITAIN - Tags: SPORT OLYMPICS CYCLING)

Russia's Alexey Korovashkov (L) and Ilya Pervukhin celebrate on the podium during the victory ceremony for the men's canoe double (C2) 1000m event at Eton Dorney during the London 2012 Olympics Games August 9, 2012. They won the bronze medal. REUTERS/Darren Whiteside (BRITAIN - Tags: SPORT CANOEING OLYMPICS)

Russia's players react on the bench during the men's quarterfinal basketball match against Lithuania at the North Greenwich Arena in London during the London 2012 Olympic Games August 8, 2012. REUTERS/Mike Segar (BRITAIN - Tags: SPORT OLYMPICS SPORT BASKETBALL)

Russia's head coach David Blatt reacts during the men's quarterfinal basketball match against Lithuania at the North Greenwich Arena in London during the London 2012 Olympic Games August 8, 2012. REUTERS/Mike Segar (BRITAIN - Tags: SPORT OLYMPICS SPORT BASKETBALL)

Spain's Eloy Teruel Rovira competes in the track cycling men's omnium 4km individual pursuit at the Velodrome during the London 2012 Olympic Games August 5, 2012. REUTERS/Stefano Rellandini (BRITAIN - Tags: OLYMPICS SPORT CYCLING)

Spain's Leire Olaberria Dorronsoro prepares to start her track cycling women's omnium flying lap 250m time trial at the Velodrome during the London 2012 Olympic Games August 6, 2012. REUTERS/Paul Hanna (BRITAIN - Tags: SPORT CYCLING OLYMPICS)

Lettering peels off the jersey of Spain's goalkeeper Arpad Sterbik Capar in their men's handball Preliminaries Group B match against Hungary at the Copper Box venue during the London 2012 Olympic Games August 4, 2012. REUTERS/Marko Djurica (BRITAIN - Tags: SPORT HANDBALL OLYMPICS)

Spain's coach Miguel Oco Gaia claps during their women's preliminary round Group A water polo match against the U.S. at the London 2012 Olympic Games at the Water Polo Arena August 1, 2012. REUTERS/Laszlo Balogh (BRITAIN - Tags: SPORT OLYMPICS SPORT WATER POLO)

Gold medallist Spain's Joel Gonzalez Bonilla looks at his medal at the men's -58kg taekwondo victory ceremony during the London 2012 Olympic Games at the ExCeL arena August 8, 2012. REUTERS/Kim Kyung-Hoon (BRITAIN - Tags: SPORT OLYMPICS SPORT TAEKWONDO TPX IMAGES OF THE DAY)