Meanwhile, Kim Clijsters breezed into the quarterfinals with a 6-1, 6-2 win over Iva Majoli in a match that took 50 minutes.

The seventh-seeded Hingis didn't look sharp enough in her fifth tournament since ankle surgery in May to compete with Dementieva, who specializes in hitting hard strokes from the baseline.

``I know Martina was injured and had it hard, but I also played well,'' Dementieva said.

Clijsters turned in her second impressive performance at the event. In her first-round match, Clijsters easily overpowered Anastasia Myskina 6-4, 6-2.

``I knew I had to apply pressure right from the start against Majoli, because if she can play her own game, she's tough,'' Clijsters said.