Seeded second, Davenport received treatment on her left foot after the second set. But she rallied for a 3-6, 7-6 (7-2), 6-2 victory as she seeks her first title since early April.

Top seed Martina Hingis of Switzerland and No. 4 Serena Williams had less trouble, both winning in straight sets.

Hingis, who is trying to hold off Davenport for the No. 1 world ranking, gave qualifier Nadejda Petrova of Russia a lesson with a 6-1, 6-3 rout.

Williams, the reigning U.S. Open champion seeking her second straight singles title, continued her run of commanding tennis by dispatching former top-10 player Patty Schnyder of Switzerland, 6-1, 6-2.

Four other seeded players secured berths in the third round today.

Eighth seed Sandrine Testud of France got past Ruxandra Dragomir of Romania, 3-6, 7-5, 6-2; 10th seed Julie Halard-Decugis of France defeated Sandra Nacuk of Yugoslavia, 6-3, 7-6 (7-3); and No. 11 Anna Kournikova of Russia set up a third-round showdown with Williams by downing Sabine Appelmans of Belgium, 6-4, 6-3.

No. 13 Jennifer Capriati of the United States, the 1991 champion, struggled past Virginia Ruano-Pascual of Spain, 3-6, 6-1, 6-4.

"The wind made it very difficult out there," said Capriati, a semifinalist at this year's Australian Open. "It was a battle out there, but sometimes you have to play in those types of conditions."

Capriati will meet seventh seed and two-time champion Arantxa Sanchez-Vicario of Spain in the third round.

Qualifier Magdalena Maleeva of Bulgaria posted the lone upset of the day session as she eliminated ninth seed Amanda Coetzer of South Africa, 6-3, 6-2. Maleeva will face Davenport for a spot in the quarterfinals.

Tonight, No. 16 Amy Frazier of the United States led Gala Leon Garcia of Spain, 3-6, 6-2, 4-3 before the match was suspended due to rain.

In matches involving unseeded players, Kveta Hrdlickova of the Czech Republic crushed Jana Nejedly of Canada, 6-3, 6-0, and Silvija Talaja of Croatia held off Nathalie Dechy of France, 7-5, 6-4.

Davenport failed to win each of the three summer hardcourt events in her home state of California.

The 24-year-old lost to Serena Williams' older sister, Venus, in the final at Stanford, California three weeks ago. She followed that with a second-round loss to Kournikova at San Diego before falling to Serena in Sunday's final of the estyle.com Classic in Los Angeles.

Ranked second in the world behind Hingis, Davenport has won two titles this season, both on hard courts. One of those came at the Australian Open in January.

Hingis has had mixed results in her first two summer hardcourt events. She reached the quarterfinals at the Acura Classic two weeks ago before falling to Williams last week in the semifinals.

The Swiss teen has won four titles this season, including the Ericsson Open on hard courts, and has reached the finals at three other hardcourt events, including the Australian Open.

Last year, Hingis ended Monica Seles' four-year reign at this event with a 6-4, 6-4 victory.

Serena Williams, seeded fourth, is trying to extend the dominance that she and her sister have displayed over the last six weeks. Venus Williams captured three straight events before Serena extended the sisters' streak to four with last week's triumph in Los Angeles.

This tournament began in 1892 and offers a $166,000 first prize.

It is the last year the event will be known as the du Maurier Open because of recently passed laws barring tobacco companies from sponsoring sports events. Next year it will be called the Roger's AT&T Canada Cup.