Carson (California):Sixth-seeded Daniela Hantuchova was upset 6-2, 6-4 by Olga Govortsova at the East West Bank Classic on Tuesday night, making an unexpectedly early second-round exit just hours after Serena Williams withdrew.
Williams, seeded No. 2, pulled out with a left knee injury.
Govortsova, 19, of Belarus, wasted three match points on her serve in the ninth game of the second set, then capitalised on her fourth with a forehand to the open court at 30-40 on Hantuchova's serve.
Govortsova, who is ranked No. 43, admitted to some nerves after taking a 5-1 lead in the second set, especially since the 12th-ranked Hantochova had rallied in a similar situation to win their first meeting last year.
Third-seeded Anna Chakvetadze of Russia had no trouble in her second-round match, toppling Marta Domachowska of Poland, 6-1, 6-1, in 49 minutes.
Earlier in the day, before Stephanie Dubois of Canada closed out the first round by beating Playboy magazine cover girl Ashley Harkleroad, 6-2, 6-3, Wimbledon quarterfinalist Nadia Petrova moved into the second round with her first hardcourt win since January, a 6-0, 6-4 victory over Russian Alina Jidkova.
She was joined in the second round by No. 10 Flavia Pennetta of Italy, No. 11 Nicole Vaidisova of the Czech Republic and No. 15 Dominika Cibulkova of Slovakia.
Williams had withdrawn Saturday at Stanford, but expressed a desire to play at the Home Depot Center over the advice of medical personnel and her father.
But she said that after warming up Tuesday morning she knew she could not compete and joined sister Venus Williams, Lindsay Davenport and Svetlana Kuznetsova on the sidelines.
Pennetta was a 6-1, 6-0 winner over Stanford champion Aleksandra Wozniak; Vaidisova beat Ayumi Morita of Japan 6-7 (5), 6-3, 6-1, and Cibulkova ousted Monica Niculescu of Romania 6-4, 6-3. King set up her match with Jankovic by beating Angela Haynes 6-3, 6-3.