NEW YORK (AP) -- All of 27, Jennifer Capriati counts as a veteran on the WTA Tour, a member of the old guard fending off the kids.
She's had highs and lows, in tennis and away from it: The rapid rise as a teen phenom. The well-documented fall from grace. The remarkable return to the top, replete with three Grand Slam tournament titles and a brief stay at No. 1.
Through it all, Capriati always has been able to count on her power with a racket. The shots and smiles came quite easily Thursday night at the U.S. Open, where she reached the third round by overpowering Martina Sucha of Slovakia 6-1, 6-1.
The tennis court is "where I live basically. I mean, I still get nerves, of course, playing in front of huge crowds, certain things might make me lose my focus," the No. 6-seeded Capriati said. "But I don't think you can get any more comfortable than how I feel about tennis tournaments."
Mary Pierce also knows the ups and downs of pro tennis.
She's been a major champion -- twice. She's also gone three years without a title at any level. She's been ranked No. 3 in the world. And, waylaid by a long series of injuries, she's fallen out of the top 100.
Faced with a 5-1 third-set deficit against No. 22-seeded Jelena Dokic, Pierce mustered just enough oomph and gumption to pull out a 6-2, 6-7 (5), 7-6 (5) victory and reach the third round on a day with a tournament-record total attendance of 56,183.
"I'm still not back to the level where I want to be. It's still a process for me," the 28-year-old Pierce said. "The fitness and my physical level are getting better, but it's not there yet. My legs kind of weren't there in the third set, so I just said, 'Start going for your shots."'
Andre Agassi always goes for his shots, conducting points as though there were a baton in his hand, and Thursday night was no different. Agassi, at 33 the oldest No. 1-ranked player in ATP Tour history, was challenged early by Andreas Vinciguerra but put together a tidy 7-6 (1), 6-1, 6-4 victory.
Agassi next faces two-time major champion Yevgeny Kafelnikov.
The only games Capriati lost, curiously, were on her own serve, and she helped Sucha by double-faulting five times. Sucha might very well have just been happy to be there, having picked up a last-minute sponsor when it was announced she'd be playing at night in a nationally televised match. Sucha wore a patch for a doughnut company, hastily stitched on her shirt.
"I miss being at the top and playing good tennis," said Capriati, who sipped a beer on court after winning a tuneup event last week for her first title since the 2002 Australian Open. "A lot of it is being physically fit. When I'm not, I'm missing some of my confidence."
Capriati was in control throughout, whipping deep strokes to compile a 28-4 edge in winners.
According to Dokic, no one hits the ball harder than Pierce. Not Serena Williams. Not Kim Clijsters.
"Some of the shots she hit," Dokic said, "I didn't see."
That might have been how Todd Martin felt as he tried to deal with French Open runner-up Martin Verkerk's serves, which consistently topped 130 mph. But Martin, the 1999 U.S. Open runner-up, withstood the Dutchman's 26 aces -- which were counterbalanced by 12 double-faults -- and eliminated No. 16 Verkerk 6-3, 6-4, 6-7 (5), 7-6 (9).
Dokic and Verkerk were among a sizable group of lower-seeded players exiting in second-round action Thursday, including No. 24 Mardy Fish, knocked off by Karol Kucera 6-4, 7-6 (7), 6-4. No. 23 Wayne Ferreira was sent packing by American Robby Ginepri, who lost to Andy Roddick in the 2000 junior Open final. Ginepri advanced to the third round of a major for the first time by beating Ferreira 6-2, 6-4, 6-7 (0), 6-2.
Seeded players advancing included major title owners Justine Henin-Hardenne, Lleyton Hewitt and Juan Carlos Ferrero.
Capriati was only 14 when she first made a Grand Slam semifinal, at the 1990 French Open. But she didn't win a major until 2001; her problems in between are a reason the WTA Tour has its current age-eligibility rules to limit the number of tournaments players aged 14-to-17 can enter.
"Where did the time go? I don't feel 27," Capriati said. "I'm just going to keep going as long as I love it, and my heart is in it."
The tour said this week it's considering changing those age rules, and one of the players who would benefit from that, 16-year-old Russian Maria Sharapova, lost to Emilie Loit 6-3, 6-4 Thursday.
At the other end of the spectrum, Martina Navratilova -- who's 46 -- teamed with Svetlana Kuznetsova to beat Jill Craybas and Conchita Martinez Granados 7-5, 6-2 in women's doubles. When they entered the court, Navratilova received a standing ovation; she smiled, waved, then bowed.
Pierce, whose ranking was 130th at the end of 2001 and is now back to 64th, was rather animated herself at the end of her match against Dokic.
At 5-5 in the tiebreaker, she smacked a cross-court backhand winner at a tough angle to get to match point. She raised both hands, threw her head back, and closed her eyes. Pierce lifted her index fingers to the sky and said, "One more!"
She got that one more point when Dokic floated a forehand wide.
Pierce was back on center court at a major.
And she looked as if she belonged.
"I just tried to stay calm and just told my myself to fight. Just kept repeating that one word to myself," Pierce said. "You never know what can happen in tennis."
Yesterday's rising star turns into today's has-been, and Dokic could be treading that ground. She was a Wimbledon quarterfinalist at 16, and a semifinalist there at 17. Now 20, she entered the Open with a sub-.500 match record this year.
Dokic went beyond the third round at just two of her past eight majors.
"Sometimes," Dokic said, "you need to really go down to come back up even stronger."
Capriati and Pierce know that well.