BEIJING - Serena Williams was knocked out of the China Open on Thursday, losing to Nadia Petrova 6-4, 3-6, 7-6 (7-5) only days before regaining the No. 1 ranking.
Williams, who will take over the women's top spot from Dinara Safina on Monday, looked sluggish early in her third-round match.
"I ran into a girl ... who has never played so good in her life," Williams said.
In the men's draw, Rafael Nadal beat Tampa residentJames Blake 7-5, 6-7 (4-7), 6-3 to reach the quarters.
OTHER TENNIS: Former No. 1Amelie Mauresmo, 30, is considering retirement after the now-20th-ranked player scratched from her last two events of the year. ... Justine Henin, 27, hopes to make her comeback from retirement in January at the Brisbane International in Australia. ... Jelena Dokic's jailed father began a hunger strike to protest his 15-month prison sentence for threatening the Australian ambassador. Damir Dokic, 50 and jailed in Serbia, was reportedly angered by a six-month suspended sentence given this week in a similar case against a nationalist who had threatened a politician and a journalist.
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Torres to use rebuilt knee as motivator
Dara Torres, who overcame huge odds to make the U.S. Olympic team in her 40s, now has a bigger challenge.
Her arthritic left knee is damaged worse than she thought, requiring a radical, reconstructive procedure that will leave her with a recovery of 12 to 18 months. But the former Florida standout said she's not giving up on the London Games.
"I think this might make me more motivated to go for 2012, just to prove I can get over this," said Torres, 42, who won three silver medals in Beijing last year. "At least I can set this as a goal."
Torres' shin will be broken during the Oct. 20 surgery in Boston and the bone shifted to create more room for cartilage to grow around her kneecap.
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BASKETBALL: Heat center Jamaal Magloire and the Pistons' Jonas Jerebko were suspended by the NBA after an altercation in a preseason game. Magloire will sit two regular-season games for striking Jerebko, who will sit one game for retaliating.
WNBA: There is no homecourt advantage in these finals. Each team can claim a victory in the other's arena, and that should be some comfort to the Indiana Fever when it faces the Phoenix Mercury tonight in the deciding Game 5. The most important road victory for Phoenix came Wednesday in Game 4, a 90-77 victory. That sent the series back to Arizona, where Diana Taurasi, Cappie Pondexter, Penny Taylor and the rest of the Mercury can claim the franchise's second title in three years.
SOCCER: Italy captain Fabio Cannavaro failed a doping test, with his club Juventus saying it was the result of cortisone used to treat a bee sting. The Italian Olympic Committee's antidoping prosecutor opened an investigation.