Serena Williams' game collapsed after she swept the first set Wednesday in the Porsche Grand Prix at Stuttgart, Germany, leading to a 0-6, 6-1, 6-4 loss to China's Li Na that will cost her the No. 1 ranking.

By dropping the second-round match Williams will be overtaken by Jelena Jankovic in Monday's new rankings, the WTA said.

Fourth-seeded Elena Dementieva, the Olympic gold medalist, advanced to the third round by beating Sybille Bammer 6-1, 6-4.

Victoria Azarenka downed No. 8 Agnieszka Radwanska 6-1, 7-5 to reach the third round. Patty Schnyder beat Svetlana Kuznetsova for the first time in more than three years, gaining the second round with a 6-4, 4-6, 7-5 victory over the fifth-seeded Russian.

Seventh-seeded Vera Zvonareva made it to the second round by beating Daniela Hantuchova 6-3, 6-2.

JAPAN OPEN: Defending champion David Ferrer beat Jesse Levine of the United States 6-4, 4-6, 6-1 Wednesday at Tokyo, and second-seeded Andy Roddick joined the Spaniard in the third round by defeating Ivo Minar 7-6 (11), 6-7 (4), 7-6 (2).

Ferrer will meet Japan's Takao Suzuki in the third round. Suzuki beat Simone Bolelli of Italy 7-6 (5), 4-6, 7-6 (5). Roddick will face Jurgen Melzer of Austria in the third round. Melzer beat Simon Stadler of Germany 6-2, 6-3.

OPEN DE MOSEILLE: Spain's Carlos Moya beat top-seeded Ivo Karlovic of Croatia 6-3, 7-6 (4) on Wednesday in the second round at Metz, France.

Moya will face fifth-seeded Dmitry Tursunov of Russia, a 6-2, 6-2 winner over Argentina's Jose Acasuso.

In another second-round match, Serbia's Janko Tipsarevic beat Latvia's Ernests Gulbis 6-4, 6-4. In the first round, French qualifier Adrian Mannarino upset sixth-seeded Andreas Seppi of Italy 6-4, 6-2, and No. 7 Radek Stepanek of the Czech Republic beat France's Julien Benneteau 6-3, 6-3.

TASHKENT OPEN: Fourth-seeded Sabina Lisicki of Germany beat Alexandra Panova of Russia 7-5, 6-1 Wednesday to advance to the quarterfinals at Tashkent, Uzbekistan.

Fifth-seeded Magdalena Rybarikova of Slovakia also reached the quarterfinals, beating Vesna Manasieva of Russia 6-1, 7-5, while Ioana Raluca Olaru of Romania rallied to beat Kyrgyz qualifier Ksenia Palkina 2-6, 6-3, 6-2.

FEDERER WITHDRAWS FROM STOCKHOLM OPEN: Roger Federer has withdrawn from next week's event at Stockholm, Sweden, saying he needs to rest before starting his quest to reclaim the top spot in the world rankings.

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