Serena Williams, playing in just her second tournament since the Australian Open, defeated Maria Kirilenko 6-2, 6-1 on Tuesday night in the first round of the JP Morgan Chase Open.
Williams has dropped to 110 in the world rankings and was unseeded in Carson. She demonstrated with the easy win over Kirilenko that her ranking is meaningless if she's healthy, according to the AP.
Laura Granville, who had lost five of her past six matches, advanced to the second round with a 7-5, 6-2 victory over ninth-seeded Ai Sugiyama earlier Tuesday.
Granville was playing just her second match since losing in the second round at Wimbledon in late June, and she said the time off had helped her recapture some of her enjoyment of the game.
Granville's win over Sugiyama was just one of a series of upsets at the final California stop of the year for the Sony Ericsson WTA Tour.
Virginia Ruano Pascual of Spain, best known for her doubles play, toppled second-seeded Nadia Petrova 6-3, 6-2 in a second round match. Anna Chakvetadze of Russia ousted No. 13 seed Anabel Medina Garrigues of Spain, 6-4, 6-3, and American Meghann Shaughnessy beat No. 17 seed Nathalie Dechy of France 4-6, 6-4, 6-4, in a 3-hour match.
No. 3 Elena Dementieva of Russia defeated Julia Schruff of Germany 6-2, 7-5 in their second round match.
Petrova won four tournaments early this year, then suffered a groin injury during a first round loss at the French Open in late May. She returned to the tour by losing her opening match last week at Carlsbad, Calif.
She said that Pascual's victory Tuesday might merit an asterisk because "you can't call it a tennis match."
Petrova's loss leaves four-time event champion Lindsay Davenport, at No. 4, as the highest seed in the bottom half of the bracket. Davenport, who hasn't played since mid-March, will face Samantha Stosur of Australia on Wednesday.