Here are some highlights from Day 8 in London.

SWIMMING
Reclaiming the lead with his trademark butterfly stroke, Phelps won the 18th gold of an unparalleled career when he helped the U.S. win the 4x100-meter medley relay Saturday night.
The U.S. women also won the medley relay on swimming's final night at the games, setting a world record in the final. Ranomi Kromowidjojo of the Netherlands took the women's 50-meter freestyle to complete a sweep of the sprints, and China's Sun Yang lowered his own world record while winning the men's 1,500 freestyle.
TRACKHow to describe the action in track and field? The Blade Runner and Britannia.
Pistorius, a double-amputee who runs on carbon-fiber blades, finished second in his 400-meter heat to earn a berth in the semifinals Sunday night. He posted a season-best time of 45.44 seconds.
The victors: Jessica Ennis in
heptathlon; Greg Rutherford in men's long jump; and Mo Farah in the
men's 10,000 meters. Three gold medals in about one hour for the host
country — and the capper to a big British surge. [VIEW PHOTOS]
Two days after being accused of "humiliating" Nigeria in a record-shattering 83-point win, the United States needed a strong finish from LeBron James to eke out a 99-94 victory over Lithuania. The Americans trailed 84-82 with 5:50 to play, but James scored nine of his 20 points in the final four minutes to help the U.S. remain unbeaten. [VIEW PHOTOS]
TENNIS
Serena Williams became only the second woman to achieve a Golden Slam, routing Maria Sharapova 6-0, 6-1 in the most lopsided women's final in Olympic history.
Star-Ledger columnist Steve Politi writes that regardless of all her titles, money and fame, Williams wanted to win in London more than anyone. [VIEW PHOTOS]
BEACH VOLLEYBALL
Two-time gold medalists Kerri Walsh Jennings and Misty May-Treanor beat the Netherlands in straight sets to advance to the tournament quarterfinals.
SHOOTINGAmerican Jamie Lynn Gray won the gold medal in women's 50-meter three-position rifle shooting, setting two Olympic records along the way.
Gray clinched gold on her final shot with a 10.8 — just 0.1 off a perfect score.
WATER POLO
Vanja Udovicic scored three goals and Serbia beat the United States 11-6 in the men's tournament, handing the Americans their first loss of the Games.
FIELD HOCKEY
New Zealand beat the United States 3-2 in the women's tournament, preventing the Americans from advancing to the medal round.