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Britain's Heather Stanning, front, and Helen Glover celebrated after winning the gold medal in the women's rowing pair event at the 2012 London Summer Olympics in Eton Dorney, near Windsor, England.

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From left, Kateryna Tarasenko, Nataliya Dovgodko, Anastasiia Kozhenkova and Yana Dementieva of Ukraine celebrate winning gold in the women's quadruple sculls at Eton Dorney in Windsor, England.

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The Netherlands’ Robert van der Horst, right, and Belgium's Florent van Aubel vied for the ball during their men's hockey preliminary round match.

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Serena Williams of the United States returned a shot to Vera Zvonareva of Russia during the third round of women's singles tennis at Wimbledon.

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Joseph Diaz Jr., right, of the United States spoke with Cuba's Lazaro Alvarez Estrada after Estrada won their men's bantam (56kg) round of 16 boxing match.

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Hassine Ghada of Tunisia competed in the women's 69kg weightlifting.

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Spectators watched the men's preliminary round beach volleyball match between Poland's Mariusz Prudel and Grzegorz Fijalek against South Africa's Freedom Chiya and Grant Goldschmidt in the rain at Horse Guards Parade.

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Seth Kelsey of the United States looked on during his match against Estonia's Nikolai Novosjolov in the men's individual epee fencing competition.

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Swimmers competed in the women's 100-meter freestyle heat at the Aquatics Centre in London.

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Norway's Linn Jorum Sulland, left, vied with South Korea's Jung Jihae during the women's preliminaries Group A handball match.

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China's Zhang Jike served to Hong Kong's Jiang Tianyi in their men's singles quarterfinals table tennis match at the ExCel venue.

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Japan's Saori Kimura (18) spiked the ball to Dominican Republic defenders Prisilla Altagracia Rivera Brens (14) and Candida Estafany Arias Perez (8) during a women's volleyball preliminary match.

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Members of Japan's team reacted during their women's 4x200-meter freestyle relay heat .

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South Korea's Jinsun Jung reacted after defeating Germany's Joerg Fiedler in the men's individual epee fencing competition.

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US swimmer Michael Phelps competed in the men's 200-meter individual medley.

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Canada's men's rowing eight celebrated after winning the silver medal in Eton Dorney.

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Amy Oliver of Britain aimed during the women's individual round of 32 eliminations at the Lord's Cricket Ground.

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Ireland's John Joe Nevin, right, boxed against Kazakhstan's Knat Abutalipov in their men's bantam (56kg) Round of 16 boxing match.

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France's Lucie Decosse reacted as she won her women's -70kg judo contest semi-final match.

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Kristin Armstrong of the United States competed in the women's individual time trial road cycling race.

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Gold medalist Kristin Armstrong of the United States kissed her son, Lucas, after winning the women's individual time trial cycling event.

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US swimmer Michael Phelps prepared for the men's 200m individual medley.

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With her hair adorned with blue, white, and red falls, France's Isabelle Yacoubou walked onto the court to face Canada during a women's basketball game.

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Shao Chieh Cheng of Chinese Taipei dived and lost her racket against Juan Gu of Singapore in their women's singles badminton.

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Thailand's Ratchanok Intanon thanked the audience after winning against Germany's Juliane Schenk at a women's singles badminton match.

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Kazuki Yazawa of Japan competed in the men's kayak single (K1) semi-final.

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Rita Keszthelyi of Hungary reacted after scoring a goal against China during a preliminary women's water polo match.