NEW YORK -- By 1:22 a.m. ET Wednesday, it was somewhat of a small, intimate gathering at Arthur Ashe Stadium, so Todd Martin was able to slap high-fives with virtually each and every one of the fans after a thrilling and lengthy fourth-round victory at the U.S. Open.

	Todd Martin held off 17 of 18 break points to finally break the spirit of Carlos Moya.

Fighting off fatigue and a cold New York night, Martin posted a gutty comeback victory, beating Spain's Carlos Moya 6-7 (3), 6-7 (7), 6-1, 7-6 (6), 6-2 in a match that took 4 hours and 17 minutes.

"I feel terrible, but I feel great," said Martin, who smashed his racket on the court after the final point, then ran around the stadium slapping hands with fans and hugging friends as if he had just won the title. "I was feeling a little bushed (after the second set) but I got off to a good start in the third and kept going."

The racket Martin so delightedly destroyed was a twisted mess, and he said he would save it to sell for charity.

Both players seemed extremely weary in the fifth set. Martin jumped out to a 4-1 lead in that set, but then nearly was broken twice by Moya. At 4-1, Martin battled back against numerous break points for Moya. Then at 5-2, Moya jumped out to a 30-0 lead against Martin's serve, but the American still battled back to win the game, and the set and match that went with it.

Martin, who saved 17 of 18 break points and served 24 aces, won a similar five-setter a year ago in the fourth round over Greg Rusedski en route to the final, where he lost to Andre Agassi.

Next up for Martin is unseeded Swede Thomas Johansson, who beat Wayne Arthurs 6-4, 6-7 (7), 6-3, 6-4.

Earlier in the session Tuesday, staying cool was the key. That was easy to do on a windy, crisp afternoon. It was important, too, for Nicolas Kiefer, who never lost his temper in the face of some questionable calls in his match against Magnus Norman.

Kiefer shrugged off the bad luck and went on to a 6-2, 6-7 (3), 6-1, 6-3 victory over the third-seeded Norman, who was the highest ranked player left after the early bailouts of No. 1 Andre Agassi and No. 2 Gustavo Kuerten.

That put Kiefer, seeded No. 14, into the quarterfinals against No. 6 Marat Safin, who beat practice partner Juan Carlos Ferrero 6-1, 6-2, 6-1.

If Kiefer's emotions threatened to spill over at the bad calls, he kept them under wraps.

"There were very bad calls," Kiefer said. "Maybe it's the bonus of the top players, I don't know. But finally I will get it soon, hopefully.

"I have to control myself. If I throw my racket or do anything else, I can't focus on my game. I try to relax, not to show too many emotions. I want to focus on the way I want to play."

It was not always that way. Kiefer's temper sometimes has gotten the better of him.

"You learn year-by-year or week-by-week," he said. "I mean two, three years ago, I would have thrown the racket from one side to the other side maybe. But now you learn, you get older, you try to behave a little bit more."

So Kiefer simply went about his business, wearing down Norman, who was coming off a marathon five-setter, that included two tiebreakers, against Max Mirnyi.

Norman said the long match against Mirnyi was not a factor and complimented Kiefer.

"He played a good match," he said. "He didn't make any mistakes. I made a lot of mistakes, too many mistakes."

Fifty-nine unforced errors were simply too much for Norman to overcome.

Safin, who leads the tour in broken rackets, had no reason to toss any against the 12th-seeded Ferrero in a match of 20-year-old neighbors who train together in Spain. He controlled it from start to finish.

It was a dramatic reversal for Safin, who played consecutive five-set matches in the second and third rounds of the Open, each of them over three hours. He disposed of Ferrero in 83 minutes, riding a power game that included 14 aces and a serve that reached 130 mph.

The victory gave him 16 wins in his last 18 matches as one of the hottest players on the men's circuits.