The victory moved the top-seeded Hingis into the semifinals.

No. 2 seed Mary Pierce wasn't as fortunate. She was beaten 6-3, 6-1 by Australian qualifier Rachel McQuillan.

``I am happy to pull it off,'' the relieved Hingis said. ``Holding serve (in the last set) was the breakthrough.

``She's (Testud) a big fighter.''

McQuillan, who contemplated retiring from professional tennis two years ago after a loss of form, was on top of her game in beating Pierce in 53 minutes on center court.

McQuillan was accurate with her service game, getting 86 percent of her first serves in to frustrate Pierce, who admitted that her game was flat.

``I have no excuses, Rachel played very well,'' said Pierce, the French Open champion. ``I played better today than in my previous game but Rachel didn't miss many shots.''

Pierce, playing with Barbara Schett of Austria, later retired from a doubles quarterfinal match against Yayuk Basuki of Indonesia and Caroline Vis of the Netherlands after losing the first set 6-1.

Pierce was bothered by tendinitis in both ankles.

Tamarine Tanasugarn of Thailand, the No. 7 seed, also reached the semifinals with a 7-6 (7-1), 6-3 win over 16-year-old Lina Krasnoroutskaya of Russia.

No. 3 seed Nathalie Tauziat of France became the other semifinalist, beating wild card entrant Selima Sfar of Tunisia 7-6 (6-3), 5-7, 6-3.