The Associated Press

NEW YORK - A long, rainy day turned into a short one for Andre Agassi.

The two-time champion moved into the U.S. Open quarterfinals Tuesday night when Taylor Dent quit because of a right hamstring injury with Agassi leading 6-7 (5), 6-4, 7-5.

It goes into the books as Agassi's 200th career Grand Slam match victory. If he wins the tournament, he'll tie Pete Sampras at 203, the third-most in the Open era behind Jimmy Connors and Ivan Lendl.

"To see him injured is outright disappointing for everybody. It doesn't matter if it's my 200th or first match. That's not the way you want it to end," Agassi said. "It started to become apparent he was struggling with the leg."

Their match was the first one to start and the only one completed because of off-and-on showers.

Action across the grounds came to a halt for good a little before 11 p.m. French Open champion Juan Carlos Ferrero won the first set 6-2 against Todd Martin; No. 5 Guillermo Coria led Jonas Bjorkman 6-2, 2-0; and 2001 Open champion Lleyton Hewitt trailed No. 11 Paradorn Srichaphan 4-3 on serve in the first set.

Also, No. 15 Ai Sugiyama led No. 29 Francesca Schiavone 7-6 (5), 5-4, and No. 7 Anastasia Myskina led Mary Pierce 7-6 (2), 2-0 in matches that were stopped in progress Monday night and resumed for less than an hour Tuesday.

Top-seeded Kim Clijsters and No. 5 Amelie Mauresmo were sent home at 5 p.m., when their quarterfinal was postponed.

Other singles matches pushed back until today: No. 3 Lindsay Davenport vs. No. 24 Paola Suarez; No. 2 Roger Federer vs. No. 13 David Nalbandian; and No. 7 Carlos Moya vs. No. 22 Younes El Aynaoui.

Officials said the tournament might not finish on time.

"The forecast right now is not all that optimistic," said Arlen Kantarian, U.S. Tennis Association CEO of pro tennis.

He was talking about the weather, but he might as well have been referring to the logjam of delayed matches.