Serena Williams upset by Li

STUTTGART, Germany (AP) -Serena Williams' game collapsed after she swept the first set Wednesday, leaving her with 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 at the Porsche Grand Prix, Williams will be overtaken by Jelena Jankovic when the new rankings come out Monday, the WTA said. The American gained the top spot when she beat Jankovic in the final of the U.S. Open three weeks ago for her ninth Grand Slam title.

Jankovic plays her first match in the tournament on Thursday against Alona Bondarenko of Ukraine in the second round.