Hingis and red-hot Lindsay Davenport are neck-and-neck in their battle for the No. 1 ranking. Hingis has held the No. 1 spot since August 9. Whoever advances further at this event will be No. 1 when the new rankings are released on April 3.

The second-seeded Davenport, who has an 18-match winning streak, will play No. 15 Elena Likhovtseva of Russia in a fourth-round match today.

Hingis, the 1997 champion, will play the winner of the match between sixth-seeded Conchita Martinez of Spain and No. 18 Amanda Coetzer of South Africa in the quarterfinals.

Fifth-seeded Serena Williams, who lost to sister Venus in last year's final, meets No. 13 Jennifer Capriati today in an All-American fourth-round match.

Two-time champion Monica Seles plays No. 9 Anna Kournikova of Russia, a runner-up in 1998, tonight.

Top men's seed Andre Agassi will meet Andrei Pavel in a third-round match today.

No. 2 Pete Sampras survived his third-round match, defeating Swiss teenager Andreas Vinciguerra, 5-7, 7-6 (7-3), 6-4 on Sunday.

In other men's third-round matches, sixth-seeded Gustavo Kuerten of Brazil meets Goran Ivanisevic of Croatia; No. 8 Marcelo Rios plays Nicolas Escude of France; ninth-seeded Nicolas Lapentti of Ecuador faces Felix Mantilla and No. 10 Tim Henman of Britain battles Mariano Zabaleta of Argentina.

First prize for the men's champion is $410,000. The women's winner pockets $350,000.