Tonight, top seed Martina Hingis of Switzerland meets No. 5 Arantxa Sanchez-Vicario in the feature match.

Earlier, second seed and four-time defending champion Monica Seles of the United States takes on ninth-seeded Austrian Barbara Schett, third seed Mary Pierce plays No. 10 Sandrine Testud in an all-French matchup and sixth-seeded Amanda Coetzer of South Africa battles the lone unseeded player remaining, Anne-Gaelle Sidot of France.

The top seed and world No. 1, Hingis needed just over an hour to dump No. 16 Chanda Rubin of the United States, 6-3, 6-1, on Thursday. She improved to 28-5 this year on hard courts.

After needing three sets to win her second-round match, Seles barely won a first-set tiebreaker before getting past No. 15 Elena Likhovtseva of Russia, 7-6 (9-7), 6-3, on Thursday.

Pierce advanced to her third quarterfinal at this event by beating 1997 finalist Anke Huber of Germany, 6-2, 7-5, while Sanchez-Vicario downed fellow Spaniard and 12th seed Conchita Martinez, 7-6 (8-6), 6-1.

Hingis dropped the first two games of the match before reeling off nine of the next 10 games to take control. She improved her season record to 48-8 as she tunes up for the U.S. Open in two weeks.

After back-to-back losses at the French Open and Wimbledon, Hingis took some time off before returning to action and winning the TIG Tennis Classic in San Diego two weeks ago. She lost in the semifinals of last week's Acura Classic in Los Angeles, but bounced back with a 6-0, 6-3 second-round win on Tuesday.

Seles has never missed a final in six appearances at this event. Her title here in 1995 was her first event since getting stabbed during a match in Hamburg, Germany in 1993.

She was sidelined for a month with a left forearm injury before returning this week. The former No. 1 player has a 27-9 record in 1999 with one title. She has won 10 of 13 matches on hard courts this season.

First prize is $150,000.