Tyler Clary of the U.S. celebrates winning the men's 200m backstroke final with an Olympic record.

Japan's Shiho Otsuka (L) challenges South Korea's Lee Seonok in their women's Group A hockey match.

U.S. gymnast Gabrielle Douglas performs on the balance beam during the artistic gymnastics women's individual all-around competition.

Michael Phelps, left, and Ryan Lochte, both from the U.S., start in the men's 200-meter individual medley swimming final.

Prince William and his wife Kate watch track cycling at the velodrome.

Greece's goalkeeper Filipos Karampetsos blocks the ball during the men's preliminary round Group A water polo match against Kazakhstan.

Spain's Pablo Herrera Allepuz misses the ball during a beach volleyball match against Japan.

U.S. gymnast Gabrielle Douglas after receiving her gold medal during the artistic gymnastics women's individual all-around competition.

Russian President Vladimir Putin congratulates Russia's Tagir Khaibulaev after he defeated Mongolia's Tuvshinbayar Naidan in their men's -100kg final judo match.

Germany's Dimitrij Ovtcharov serves to Taiwan's Chuang Chih-yuan in the men's singles bronze medal table tennis match.

Russian President Vladimir Putin, Britain's Prime Minister David Cameron and Foreign Secretary William Hague watch the women's -78kg final judo match between Kayla Harrison of the U.S. and Britain's Gemma Gibbons.