Michael Phelps (far left) edged Milorad Cavic, of Serbia, by 0.01 seconds to win the 100-meter butterfly. With the victory, the 23-year-old American pulled even with Mark Spitz's seven gold medals from the 1972 Munich Games.
2 of 16Heinz Kluetmeier/SI
After trailing Cavic for the majority of the race, Phelps (far left) won the 100-meter butterfly by a fingernail. Literally.
3 of 16Heinz Kluetmeier/SI
Phelps will return to the Watercube on Sunday to swim in his final event at the Beijing Games, taking the butterfly leg of the 4 x 100-meter medley relay. If the Americans are able to capture gold, Phelps will become the world record-holder for most gold medals in a single Olympics with eight.
4 of 16Peter Read Miller/SI
After taking three silver medals, Zimbabwe's Kirsty Coventry (left) won her first gold in Beijing, defending her title in the women's 200-meter backstroke. Her time of 2.05.24 set a world record in the race.
5 of 16Heinz Kluetmeier/SI
Cesar Cielo Filho won Brazil's first swimming gold with an upset in the 50m freestyle and set a new Olympic record of 21.30. He broke down crying on the medal stand and was mobbed by his teammates on deck.
6 of 16Bob Martin/SI
Rebecca Adlington of Britain won gold in the 800m freestyle, breaking Janet Evans' 19-year-old world record -- the oldest record in swimming. Adlington's time of 8:14.10 crushed the mark of 8:16.22 set by the American in Tokyo on Aug. 20, 1989. Alessia Filippi of Italy took the silver, and Lotte Friis of Denmark the bronze.
7 of 16Bob Martin/SI
Usain Bolt of Jamaica easily broke his own world record in the 100 meters to win the Olympic gold in 9.69 seconds.
8 of 16Simon Bruty/SI
Mahiedine Mekhissi of France placed second in his 3000m steeplechase preliminary heat with a time of 8:16.95.
9 of 16Simon Bruty/SI
Mae Koime (2566) of Papua New Guinea placed sixth in the 100m preliminary heat, while the Bahamas' Debbie Ferguson McKenzie (1094) finished second to advance.
10 of 16Al Tielemans/SI
The women's 100m heats began early Saturday at Beijing's Bird Nest. Jamaica's Kerron Stewart (2178) finishes third in her preliminary race.
11 of 16John Biever/SI
American 48 kg wrestler Clarissa Chung was pinned in her bronze-medal match against Japan's Chiharu Icho.
12 of 16Simon Bruty/SI
Yemen's Waseelah Saad failed to qualify in the 100m after finishing seventh in her preliminary heat.
13 of 16Bill Frakes/SI
Russia's Valeriy Borchin edged out former champion Jefferson Perez of Ecuador in the 20km walk. Borchin finished with a time of 1 hour 19:01 minutes.
14 of 16John W. McDonough/SI
Yao Ming of China huddles up with his team during the preliminary game against Germany. He led all scorers with 25 points in his team's 59-55 victory.
15 of 16Robert Beck/SI
Overview of the men's points race at track cycling. Joan Llaneras of Spain took gold for a second time.
16 of 16Simon Bruty/SI
Yana Maksimava of Belarus at the heptathlon javelin throw.
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