Martina Hingis played near-perfect tennis once she figured out the right strategy.

Arantxa Sanchez Vicario won before she had a chance to even worry about strategy. After just six points, she found herself applying ice to her opponent's sprained ankle.The fourth-seeded Hingis, No. 2 Sanchez Vicario and other seeds playing today advanced without much trouble into the third round, except for men's No. 11 Jim Courier. The two-time champion needed 3 hours, 37 minutes to edge Czech player Slava Dosedel 4-6, 6-2, 3-6, 6-4, 6-4, Courier's second straight five-setter.

No. 1 Pete Sampras lost the first set, but still needed less than two hours to oust Romanian Adrian Voinea 3-6, 6-2, 6-3, 6-2.

Hingis beat Lisa Raymond 6-4, 6-2. Sanchez Vicario's score reached just 1-0 before Stephanie de Ville of Belgium had to quit.

Hingis found Raymond's game a little puzzling at first, but "I just knew after the first set what I was going to do and how I can make the point," said Hingis, 16, who has vaulted up the rankings from 16th a year ago.

She next faces 34th-ranked Barbara Schett of Austria, and also would face an unseeded player in the fourth round. If all the seeds win, Hingis would face No. 8 Irina Spirlea of Romania or No. 9 Karina Habsudova of Slovakia in the quarterfinals and Sanchez Vicario in the semifinals. No. 1 Steffi Graf is in the other half of the draw.

Sanchez Vicario, who lost to Hingis in the U.S. Open, put in five of her six first serves and had an ace in her brief encounter with de Ville, but would have preferred playing a full match.

She went out to practice for an hour before playing her first-round doubles match. She and Gigi Fernandez, the top-seeded pair, beat Amanda Coetzer and Mary Pierce 6-3, 6-2.

Last year's runner-up, No. 5 Anke Huber of Germany, beat Italy's Francesca Lubiani 4-6, 6-2, 6-0 in a match postponed from Wednesday, when Huber's mother collapsed outside the players' restaurant at the National Tennis Center. Huber accompanied her mother in an ambulance to the hospital.

In other women's matches, Spirlea beat Joannette Kruger of South Africa 6-1, 6-1; Habsudova defeated Australian Nicole Bradtke 6-3, 6-3; and No. 14 Mary Joe Fernandez ousted Indonesia's Yayuk Basuki 7-5, 6-4.

No. 15 Chanda Rubin, a semifinalist last year who sat out most of the season because of a hand injury, advanced easily with a 6-2, 6-1 victory over France's Sandrine Testud.

No. 3 Goran Ivanisevic beat Karol Kucera of Slovakia 6-4, 6-2, 6-2; No. 5 Thomas Muster breezed past South African Grant Stafford 6-3, 6-2, 6-2; No. 8 Wayne Ferreira beat Argentina's Javier Frana 6-3, 3-6, 6-2, 6-1; No. 10 Albert Costa beat Jan Kroslak of Slovakia; and No. 16 Alberto Berasategui ousted fellow Spaniard Tomas Carbonell 6-3, 7-5, 6-4.