American Mardy Fish advanced to the second round of the U.S. Open with a 6-0, 3-6, 4-6, 6-0, 6-1 victory over Jan Hajek of the Czech Republic.
Fish is seeded 19th and is one of only seven Americans ranked in the top 100. He joins Taylor Dent and ninth-seeded Andy Roddick in the second round, with John Isner, James Blake, Sam Querrey and Donald Young still waiting for their first-round matches.
Fish lost to Roger Federer in the final of the Cincinnati Masters two weeks ago.
On Tuesday, he served 24 aces and needed only 20 minutes to win the first set. Then after losing the next two sets, he won the last two in just 51 minutes.
Earlier, Arnaud Clement upset 16th-seeded Marcos Baghdatis 6-3, 2-6, 1-6, 6-4, 7-5 in the first round.
Their match lasted nearly 3½ hours in heat that topped 90 degrees.
The 68th-ranked Clement is a former top 10 player who reached the 2001 Australian Open final. But he hadn't defeated anyone ranked in the top 20 at a Grand Slam tournament in eight years.
Baghdatis was the runner-up at the 2006 Australian Open, was ranked as high as No. 8 that year and had won his most recent four matchups against Clement. But Baghdatis has never made it past the second round at Flushing Meadows.
In other action, No. 23 Feliciano Lopez advanced with a 6-4, 6-4, 6-4 win over Santiago Giraldo.