Japan's forward Kensuke Nagai (C) heads the ball during the 2012 London Olympics men's football match between Japan and Mexico at the Wembley stadium in London August 7, 2012. Mexico won 3-1. –Photo by AFP

Mexico's Israel Jimenez, left, challenges for the ball with Japan's Yuki Otsu, right, during their men's soccer semifinal match at Wembley Stadium at the 2012 Summer Olympics, Tuesday, Aug. 7, 2012, in London. –Photo by AP

Gold medalist Anna Mears, of Australia, celebrates beating Silver medalist Victoria Pendleton of Britain after winning the gold medal in the track cycling women's sprint event, during the 2012 Summer Olympics, Tuesday, Aug. 7, 2012, in London. –Photo by AP

China's Zhao Shuang, center, is defended by Australia's Samantha Richards, left, and Rachel Jarry, right, during a quarterfinal women's basketball game at the 2012 Summer Olympics, Tuesday, Aug. 7, 2012, in London. –Photo by AP

Great Britain's Glenn Kirkham (L) battles for the ball with Spain's Xavi Lleonart during their men's group A hockey match at the Riverbank Arena at the London 2012 Olympic Games August 7, 2012. –Photo by Reuters

Australia's Sally Pearson (C) clears a hurdle ahead of Canada's Jessica Zelinka (2nd L) and Lolo Jones of the U.S. (2nd R) during their women's 100m hurdles semi-final during the London 2012 Olympic Games at the Olympic Stadium August 7, 2012. –Photo by Reuters

Mary Killman and Mariya Koroleva of the United States compete during women's duet synchronized swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Tuesday, Aug. 7, 2012. –Photo by AP

Ma Huanhuan, left, of China shoots against Allegra Lapi of Italy during their women's semifinal fifth to eighth place water polo match at the 2012 Summer Olympics, Tuesday, Aug. 7, 2012, in London. -Photo by AP

Netherlands' Dorian van Rijsselberge poses with his gold medal for the men's RS-X sailing class during the victory ceremony at the London 2012 Olympic Games in Weymouth and Portland, southern England, August 7, 2012. -Photo by Reuters

Members of the Netherlands' equestrian dressage team from left, Anky van Grunsven, Edward Gal, and Adelinde Cornelissen celebrate after winning the bronze medal in the equestrian dressage team competition at the 2012 Summer Olympics, Tuesday, Aug. 7, 2012, in London. –Photo by AP