Sam Stosur won the latest-finishing women's match in U.S. Open history, erasing four match points to beat 2004 runner-up Elena Dementieva 6-3, 2-6, 7-6 (2) in the fourth round.
There were 15 service breaks in the 2-hour, 38-minute match that ended at about 1:35 a.m. Monday.
The previous record for a U.S. Open women's match came in 1987, when Gabriela Sabatini and Beverley Bowes finished at 1:30 a.m.
The fifth-seeded Stosur is the first Australian woman to reach the U.S. Open quarterfinals since Wendy Turnbull in 1986.
Stosur faces defending champion Kim Clijsters next.
Britain's Andy Murray was bundled out of the U.S. Open in the third round Sunday, losing 6-7 (3), 7-6 (4), 6-3, 6-3 to No. 25 Stanislas Wawrinka of Switzerland.
Murray alone bears the burden of Britain's hopes for its first male Grand Slam champion since 1936. He was a popular pick to go far at Flushing Meadows; he was the runner-up at the 2008 U.S. Open and at this year's Australian Open, also on hard courts.
''I have no idea whether I'll win a Grand Slam or not. I want to. But if I never win one, then what? If I give 100 percent, try my best, physically work as hard as I can, practice as much as I can, then that's all I can do,'' said the 23-year-old Murray, who was treated by a trainer for leg and elbow issues. ''It's something I would love to do. It's a very difficult thing. I don't know if I'll win a Grand Slam or not. But I'll give it my best shot.''
He served poorly against Wawrinka, putting only half of his first serves in and getting broken eight times.
Wawrinka will next attempt to solve the serve of American Sam Querrey, who hit 19 aces at up to 137 mph (220 kph) and never was broken in a 6-3, 6-4, 6-4 win over by 14th-seeded Nicolas Almagro of Spain .
It's been seven years since a man from the United States won the country's most important tennis tournament. Indeed, it's been that long since an American man won any Grand Slam singles title.
The 20th-seeded Querrey is all-too-aware of such statistics.
''The average sports fan watches the Grand Slams, and they watch on Saturday and Sunday and the semis and the finals,'' said the 22-year-old Querrey, the youngest man left in the field. ''That's what we need to do. We need to get some guys there.''
At the 2009 U.S. Open, no U.S. men reached the quarterfinals for the first time in the history of an event that began in 1881. This time, of 15 Americans that entered the tournament, there are two who are still around for the fourth round - Querrey and No. 19 Mardy Fish - after No. 18 John Isner lost to No. 12 Mikhail Youzhny of Russia 6-4, 6-7 (7), 7-6 (5), 6-4 despite hitting 33 aces Sunday night.
Isner's trip to the U.S. Open ended in the third round and included none of the drama or history he created at Wimbledon.
The 18th-seeded American lost to No. 12 Mikhail Youzhny of Russia 6-4, 6-7 (7), 7-6 (5), 6-4 Sunday night, then said he didn't think he paid any price physically at Flushing Meadows for all the wear-and-tear his body took at the All England Club during the longest match in tennis history.
''I don't think tonight had anything to do with that match, I would say,'' Isner said.
At Wimbledon in June, Isner won a 70-68 fifth set over Nicolas Mahut in the first round, a match that lasted 183 games over 11 hours, 5 minutes. He played a total of 116 games and 8 hours, 12 minutes in New York.
''I'm not the fastest guy out there, but I didn't feel as explosive. My legs I think just didn't have the bend that I needed to on my serve, on my groundstrokes,'' he said. ''I mean, I wasn't dealt the greatest hand coming into this tournament with really no preparation. So that maybe had something to do with it.''
The 6-foot-9 (2.06-meter) Isner lost Sunday despite pounding 33 aces at up to 144 mph. His biggest problem: 61 unforced errors, 25 more than Youzhny, who reached the fourth round at Flushing Meadows for the first time since he was a semifinalist in 2006.
Isner, never past the fourth round at a Grand Slam tournament, got broken four times - in the opening game of the match, twice in the second set, and once in the fourth.
''I was playing from behind pretty much a lot of that match,'' he said.
After trailing 5-1 in the second set, he made things interesting by breaking Youzhny for the only two times in the match to force a tiebreaker. Motioning between points to the Arthur Ashe Stadium crowd to make more noise, Isner steadily picked up momentum and evened the match at a set apiece by converting his fifth set point on a service winner.
''You would think from there I would have all the momentum,'' Isner said. ''He just keeps with it. That's a big credit to him. I mean, I definitely did have the momentum, but he just stayed steady and, you know, just outplayed me a little bit.''
The third set also went to a tiebreaker, and Isner went ahead 4-3 with his 23rd ace, at 122 mph. But Youzhny collected four of the next five points, ending the set with the fourth of his five aces.
Youzhny now faces 41st-ranked Tommy Robredo of Spain in the fourth round. Robredo's last two opponents retired during the match, including Michael Llodra on Sunday.
Fish will take on No. 3 Novak Djokovic of Serbia in the third round. Querrey never has been to the quarterfinals at a major tournament, nor has Wawrinka.
Wawrinka's win was the only significant surprise on a day that saw No. 1 Rafael Nadal and four other Spaniards advance: No. 8 Fernando Verdasco, No. 10 David Ferrer, No. 23 Feliciano Lopez, and unseeded Tommy Robredo.
''Probably the most difficult tournament for us, no?'' Nadal said after beating Gilles Simon of France 6-4, 6-4, 6-2. ''So that is very important news for Spanish tennis.''
When Andy Roddick - the American who won the 2003 U.S. Open - briefly dropped to 11th in August, it was the first time since the rankings began in 1973 that there were no U.S. men in the top 10. That alone was enough to cue a new chorus of questions about the state of the game in a nation that produced Pete Sampras and Andre Agassi, Jimmy Connors and John McEnroe.
With Sunday's five Spaniards joining No. 21 Albert Montanes, who won Saturday, that country has six members of the last 16 - tying the record for a country other than the United States at the U.S. Open.
''It's always nice to see all the Spanish winning and being in the last rounds, no?'' said Verdasco, who eliminated 2002 Wimbledon runner-up David Nalbandian of Argentina 6-2, 3-6, 6-3, 6-2.
Ferrer beat Daniel Gimeno-Traver of Spain 7-6 (2), 6-2, 6-2; the opponents of Robredo and Lopez retired during their matches. The winners of Nadal vs. Lopez, and Ferrer vs. Verdasco will meet for a semifinal spot.
''I don't really care whom I'm playing against,'' Nadal said, ''if they're all Spaniards.''
There is only one American woman left, and it's seven-time Grand Slam champion Venus Williams, who struggled with her serve and kept yanking at the hemline of her red, sequin-dotted dress but eventually beat 16th-seeded Shahar Peer of Israel 7-6 (3), 6-3 to reach the quarterfinals in New York for the 10th time.
Williams put 48 percent of her first serves in, and was broken three times. She wasted her first six set points in the opening tiebreaker. And yet she improved to 6-0 against Peer. Williams next faces reigning French Open champion Francesca Schiavone of Italy, a 6-3, 6-0 winner against 20th-seeded Anastasia Pavlyuchenkova.
Williams was the last woman to win the U.S. Open two years in a row, in 2000 and 2001, and defending champion Kim Clijsters of Belgium is trying to match that feat. Clijsters easily got past former No. 1 and 2008 French Open champion Ana Ivanovic 6-2, 6-1 of Serbia on Sunday.
''The pressure is a privilege. It's something that comes because you've done well in the past, and I look at it in that way,'' said Clijsters, who will play No. 5 Sam Stosur of Australia or No. 12 Elena Dementieva of Russia in the quarterfinals. ''I know how hard it is to try and win those seven matches and how much you have to be focused and work, especially on the details.''
She won seven consecutive games in one stretch to seize control, and her deep groundstrokes and usually strong defense put pressure on Ivanovic, who made 28 unforced errors.
''I was on the big stage again,'' said Ivanovic, whose ranking dropped to 65th in July but now is back up to 40th. ''Lots of emotions came back, and I just felt a little slow and just a little bit out of it.''
