Venus Williams and Jennifer Capriati lost their shots at qualifying for the WTA Tour Championships with losses Friday in the Advanta tournament.
Top-seeded Amelie Mauresmo beat Williams, 7-5, 5-7, 6-1. Vera Zvonareva ousted Capriati fell, 6-0, 6-1, in their quarterfinals match.
"It was a story of my errors," Williams said. "I'm always putting play forward, which is the style of my game."
Zvonareva tracked down nearly every ball and took advantage of Capriati's frequent serving problems.
"She's fast," Capriati said. "When someone gets confidence, the more confident they get, the better they play, and I wasn't putting enough juice on the ball today."
Zvonareva will face Nadia Petrova in the semifinals. Seventh-seeded Petrova defeated French Open champion Anastasia Myskina, 6-3, 4-6, 6-4.
Wimbledon champion Maria Sharapova, seeded third, defeated Olympic bronze medalist Alicia Molik, 3-6, 6-1, 6-3 to reach the semifinals.