London Olympics | Day Eight

Michael Phelps reaches into the pool to congratulate teammate Nathan Adrian who swam the last leg of the men’s 4x100 medley relay to win the gold medal. Matt Grevers and Brendan Hansen also swam in the relay.  (Robert Gauthier / Los Angeles Times)

Jessica Ennis of Great Britain celebrates winning gold in the women’s heptathlon.  (Ian Walton / Getty Images)

Britain’s Mo Farah, left, wins gold ahead of the United States’ Galen Rupp in the men’s 10,000-meter final.  (Kirsty Wigglesworth / Associated Press)

Yang Sun of China won the gold medal in the men’s 1,500m freestyle.  (Dennis M. Sabangan / EPA)

American swimmers Dana Vollmer, Rebecca Soni, Missy Franklin and Allison Schmitt embrace after winning the women’s 4x100 medley relay. They set a world record of 3:52.05.  (Robert Gauthier /Los Angeles Times)

Gold medalist Chen Ding of China walks in the final lap of the men’s 20-kilometer race walk near Buckingham Palace.  (Charlie Riedel / Associated Press)

Jamie and Alison Zaslav of New York stand during the U.S. national anthem at the start of a men’s basketball game between Team USA and Lithuania.  (Robert Gauthier / Los Angeles Times)

Courtney Hurley of the United States celebrates her victory in the women’s epee team fencing finals. She defeated Anna Sivkova of Russia, 31-30, as the U.S. team won the bronze medal.   (Hannah Johnston / Getty Images)

Tyson Gay of the United States prepares for his 100-meter heat. He won to qualify for the next round.  (Matt Slocum / Associated Press)

Cassidy Krug of the United States competes in the women’s 3m springboard semifinals.   (Patrick B. Kraemer / EPA)

China’s Li Xuerui tosses racket after beating fellow countrywoman Wang Yihan in the women’s singles badminton match for the gold medal.  (Andres Leighton / Associated Press)

South Africa’s Oscar Pistorius, running on carbon-fiber prosthetics, qualified for the next round in the 400-meter race.   (Wally Skalij / Los Angeles Times)

Serena Williams of the United States gets herself pumped during the Olympic finals. She defeated Maria Sharapova of Russia to win the gold medal.   (Elise Amendola / Associated Press)

United States’ Mike Bryan, top, and his twin brother Bob celebrate after defeating Jo-Wilfried Tsonga and Michael Llodra of France in the men’s tennis doubles gold medal match.  (Elise Amendola / Associated Press)

Jamaica’s Usain Bolt, left, wins his qualifying heat of the 100- meter race.  (Wally Skalij / Los Angeles Times)

Everton dos Santos Lopes, left, of Brazil hits Roniel Iglesias Sotolongo of Cuba during their round-of-16 light welterweight boxing match.  (Jack Guez / AFP / Getty Images)

Nicola Spirig of Switzerland, right, and Lisa Norden of Sweden sprint to the finish line in the women’s triathlon. Spirig won the gold medal by the thinnest of margins.   (Hannibal / EPA)