Top seeds Roger Federer and Rafael Nadal both won in straight sets Wednesday and did their part to help the U.S. Open get back on schedule as organizers tried to make up for the previous day's rain when almost a full day's play was lost.

Federer only faced one break point and beat Taiwan's Yeu-Tzuoo Wang 6-4, 6-1, 6-0 while Nadal won the first eight points and went to a 6-4, 6-4, 6-4 victory over Mark Philippoussis.

"I thought I always was in control," Federer said. "I always got to break first in the set, which always helps. I thought I played well, not too many mistakes."

Tenth-seeded Fernando Gonzalez, No. 12 Tomas Berdych and No. 15 Lleyton Hewitt also won in straight sets, part of the 80 matches that were scheduled involving 37 seeded players.

After rain delayed play on Monday for 90 minutes but allowed all matches to finish, only nine started on Tuesday and none were completed.

The revised calendar included about a quarter more matches than were scheduled for Tuesday and utilized an additional satellite court.

Top-seeded Amelie Mauresmo, whose match was one nine matches that was suspended on Tuesday, returned to win five straight games and completed a 6-1, 7-5 victory over Germany's Kristina Barrois.

Mauresmo trailed 5-2 in the second set when play was halted on Tuesday.

"I just thought yesterday, and especially in the second set, I was way too much behind my baseline and so she was able to take control and really hit some great shots," Mauresmo said. "So today I didn't want to let that happen again, even try to be a little bit more aggressive."

Gonzalez defeated Jiri Vanek of the Czech Republic, 6-2, 6-3, 6-2; Berdych beat Boris Pashanski of Serbia 6-4, 6-2, 6-1; and Hewitt dispatched Spain's Albert Montanes 7-5, 6-4, 6-3.

Hewitt's victory was a completion of a match suspended at 5-5 on Tuesday.

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No. 4 David Nalbandian also won, but had to rally from two sets down for a 4-6, 6-7 (2), 6-3, 7-5, 6-2 victory over Germany's Michael Berrer.

Nadal converted three of four break-point opportunities, while Philippoussis countered with 19 aces.

"Philippoussis is a very big server," Nadal said. "He served unbelievable, especially the first serve. Sometimes three aces in one game, two aces. But I was in the beginning very, very good. I play unbelievable first game. That's important for the rest, for the confidence."

No. 8 Martina Hingis had to recover after being broken twice in the first set for a 4-6, 6-1, 6-3 victory over China's Peng Shuai. After committing 14 unforced errors in the first set, Hingis had only 14 the rest of the way.

No. 11 Anastasia Myskina, who had just started her match Tuesday before it was halted, returned for a 6-4, 6-2 victory over Viktoria Azarenka of Belarus.

In other women's play, No. 13 Mary Pierce beat Elena Vesnina 7-5, 6-1; No. 16 women's seed Ana Ivanovic needed a third set but finally prevailed over Vera Dushevina of Russia 6-3, 5-7, 6-4; and unseeded former champion Serena Williams defeated Lourdes Dominguez Lino 6-1, 6-2.

Former men's champion Marat Safin, who has fallen from 12th to 104th in the ATP rankings in the past eight months, also won, dispatching Robin Vik 6-1, 6-1, 4-6, 6-3.

"It's just the first round. It feels much better when you win, that's for sure," he said. "When you win the first match, you have plenty of matches to go."

It was a good day for the family as Safin's sister, No. 12 Dinara Safina, also won, 6-1, 6-3 over Ukraine's Yulia Beygelzimer.

The day began with a misty rain, which forced grounds crew to work on the courts and delay the start of play by about 15 minutes. The mist dissipated but the clouds remained throughout the afternoon.

It didn't matter to 19-year-old American wild card Ryan Sweeting, who was the first to complete a victory Wednesday, beating Guillermo Coria when the Argentine retired with a torn right thigh muscle trailing 3-2 in the first set.

To the 19-year-old Bahamian-born amateur, the weather couldn't have been nicer.

"It's been a good summer," Sweeting said. "I'm glad to get to the second round. It's not the way you want to go through, but..."