Beijing, Aug.17 : American swimmer Michael Phelps won an unprecedented eighth gold medal at the Beijing Games on Sunday as the United States won the men's 4x100m medley relay in world record time.
With the victory, Phelps overtook compatriot Mark Spitz, whose seven swimming golds at Munich in 1972 were the most at a single Games.
At 23, and competing in his third Olympics, Phelps took his total of Olympic titles to 14, including six from Athens, where he also claimed two bronze.
The US squad of Aaron Peirsol, Brendan Hansen, Phelps and Jason Lezak won a tight race in 3:29.34, Lezak holding off Australian individual world record-holder Eamon Sullivan on the closing freestyle leg.
The United States were lying third when Phelps hit the water for the penultimate butterfly leg. He had given the United States a narrow lead by the time he handed over to Lezak.
"I don't know what to feel right now, there are so many emotions going through my head and so much excitement, I guess I just want to see my mom," Phelps said.
The Americans improved on the previous world record of 3:30.68, while Australia finished second in 3:30.04 and Japan took the bronze in 3:31.18.