The Swiss teenager has won eight of 11 career matches against Martinez, including a 6-0 mark on hardcourts. Martinez won the last meeting at the German Open on clay in May.

Fourth seed Serena Williams of the United States will face No. 7 Arantxa Sanchez-Vicario of Spain in tonight's second semifinal match.

After breezing through her first two matches, Hingis was pushed to the limit by Sandrine Testud in their quarterfinal encounter before outlasting the Frenchwoman, 6-4, 4-6, 6-3, on Friday.

Martinez, a semifinalist here in 1997, beat Anne Kremer of Luxembourg, 6-2, 6-4 in the quarterfinals.

Seeking her second straight singles title, Williams extended her winning streak to eight matches by crushing fellow American and 16th seed Amy Frazier, 6-0, 6-1, in only 50 minutes on Friday.

Sanchez Vicario swept past Bulgarian qualifier Magdalena Maleeva, 6-1, 6-4.

Hingis, who improved to 51-8 this season, is coming off a semifinal loss to Williams last week in the semifinals of the estyle.com Classic in Los Angeles. She 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 title reign at this event with a 6-4, 6-4 victory.

The 18-year-old Williams 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.

The draw opened up slightly Thursday when second seed Lindsay Davenport was forced to retire with a left foot injury in the first set of her match with Maleeva.

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.