Beijing:Michael Phelps has become the winningest Olympic athlete ever, earning his fourth gold medal of the Beijing Games with a world record in the 200-meter butterfly.
The American touched in 1 minute, 52.03 seconds on Wednesday, lowering his old mark of 1:52.09 set at last year's world championships in Australia.
It was Phelps' 10th career gold medal, breaking a tie with Mark Spitz, Carl Lewis and two others for most golds. He is 4-for-4 so far, setting world records in each of his events.
Laszlo Cseh of Hungary took the silver in 1:52.70. Takeshi Matsuda of Japan got the bronze in 1:52.97.