Maria Sharapova out in Tokyo with injured ankle 2011 Video And Pictures

maria sharapova out in Tokyo with injured ankle

TOKYO (AP) – Maria Sharapova twisted her ankle while serving Thursday and quit her Pan Pacific Open quarterfinal against Petra Kvitova in a rematch of this summer's Wimbledon final.

Maria Sharapova of Russia receives treatment after injuring her left ankle in her match against Petra Kvitova.

By Kiyoshi Ota, Getty Images

Maria Sharapova of Russia receives treatment after injuring her left ankle in her match against Petra Kvitova.

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By Kiyoshi Ota, Getty Images

Maria Sharapova of Russia receives treatment after injuring her left ankle in her match against Petra Kvitova.

Kvitova was ahead 4-3 in the first set when Sharapova was injured. Sharapova limped to her chair and pulled out after speaking with her trainer. She went to a hospital for an MRI.

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"I hit a serve and then landed awkwardly on my left ankle," said Sharapova, seeded second. "I felt a sharp pain and next thing I knew I was on the floor. It swelled up immediately and I knew there was no way I could continue."

Added Kvitova: "It's sad because we were both playing so well. It was a great match but I could see (the ankle) was really big. Hopefully, she will be OK."

At the Wimbledon title match in July, Kvitova beat Sharapova 6-3, 6-4 for her first major championship.

Kvitova, the fifth-seeded Czech, will next face fourth-seeded Vera Zvonareva, who defeated Maria Kirilenko 6-3, 6-3 in an all-Russian match.

"I played her already three times, the last time in Madrid on clay when I beat her," Kvitova said. "She's a very good player. She has a great serve and hits the ball well so it will be a tough match."

Zvonareva had five aces and improved to 6-0 against Kirilenko.

"I'm really happy that my serve helped me today," Zvonareva said. "The first serve was good and my second serve even caused her some problems, and that made a big difference."

Kirilenko knocked out U.S. Open champion Samantha Stosur on Tuesday and beat 12th-seeded Ana Ivanovic on Wednesday. But she struggled with her serve against Zvonareva and was broken three times.

"Maria is a great player and a great fighter, and proved it by beating two tough opponents on her way to the quarterfinals," Zvonareva said. "There is no secret to beating her. I just tried to make some shots that caused her some discomfort and was able to do that."

Third-seeded Victoria Azarenka of Belarus defeated seventh-seeded Marion Bartoli of France 7-5, 6-0 to reach the final four. She will next face Agnieszka Radwanska of Poland, who downed Kaia Kanepi of Estonia 6-2, 7-6 (9-7).