TOKYO (AP) -- Top-ranked Martina Hingis ousted Lisa Raymond 6-3, 7-5 today to advance to the quarterfinals in the Pan Pacific Open women's tennis.

Hingis, the defending champion, is the favorite to win the tournament, as second-ranked Lindsay Davenport of the United States is out with an injured left hamstring.

Raymond, ranked 27th, led 5-4 in the second set before Hingis came back and won three straight games to close out the match.

``I started off very well and was focused. I didn't make many mistakes and I knew the way she plays,'' said Hingis, adding that she lost a little bit of concentration midway through the second set. ``But I'm happy I made it through two sets.''

In the other second-round match of the day, third-seeded Nathalie Tauziat of France beat Zimbabwe's Cara Black 6-3, 6-3.

The other two seeds who received first-round byes -- Mary Pierce of France and South Africa's Amanda Coetzer -- were set to play their opening matches Thursday.

In first-round action, eighth-seeded Ai Sugiyama of Japan was eliminated by Slovenia's Katarina Srebotnik 6-3, 6-3. Srebotnik, ranked 65th, raced to a 3-0 lead in the opening set as Sugiyama struggled to find her rhythm and range.

``I think she was a little nervous because she's playing in Japan, while I really played well without too many unforced errors,'' Srebotnik said.

Srebotnik, 18, had a tremendous breakthrough last year, winning her first singles title, two doubles titles, a Grand Slam mixed doubles title and playing in her first Grand Slam singles events in the French Open.