Hingis, the second seed and 1997 champion, dumped Belgium's Dominique Van Roost, 6-2, 6-4, today to become the first to secure a semifinal berth at the $520,000 TIG Tennis Classic.

German qualifier Anke Huber advanced to the quarterfinals today by rallying for a 5-7, 6-4, 6-3 win over Austria's Barbara Schett.

Tonight, France's Sandrine Testud upset sixth seed Arantxa Sanchez-Vicario of Spain, 6-2, 7-5, in a second-round match.

The three remaining quarterfinals take place Friday. Huber meets top seed Lindsay Davenport of the United States, American Venus Williams, the fourth seed, takes on Testud, and No. 7 Amanda Coetzer of South Africa battles American Amy Frazier.

Davenport is 17-1 in her last 18 matches in her native California. The streak dates to last season, when she swept all three summer hardcourt tournaments in California. The only loss for the 23-year-old Newport Beach resident in that span was to fellow American Serena Williams in March at Indian Wells.

Davenport successfully defended her title at the Bank of the West Classic on Sunday in Stanford, defeating Serena's older sister, Venus, 7-6 (7-1), 6-2. The reigning Wimbledon champion is 34-5 this season, including 19-3 on hard courts, and will try to win her second straight U.S. Open later this summer.

Venus Williams is 37-7 in 1999 and has won 15 of her last 16 matches on hardcourts. Her loss to Davenport was only her fourth in 24 matches on hard surfaces this season.

First prize is $80,000.