Andrea Petkovic of Germany celebrates after winning a point against Stefanie Voegele of Switzerland during the final match of the GDF Suez Open Romania women tennis championship in Bucharest May 10, 2009.

Andrea Petkovic of Germany returns the ball to Stefanie Voegele of Switzerland during the final match of GDF Suez Open Romania women tennis championship in Bucharest May 10, 2009.

Andrea Petkovic of Germany serves the ball to Stefanie Voegele of Switzerland during the final match of the GDF Suez Open Romania women tennis championship in Bucharest May 10, 2009.

Andrea Petkovic of Germany returns the ball to Stefanie Voegele of Switzerland during the final match of the GDF Suez Open Romania women tennis championship in Bucharest May 10, 2009.

Getty Images 7 months ago

Germany's Andrea Petkovic serves to Russia's Svetlana Kuznetsova during their first round tennis match of the WTA tournament on April 29, 2009 in Stuttgart. Kuznetsova won 6-4, 5-7, 6-1.

Getty Images 7 months ago

Germany's Andrea Petkovic returns a shot to Russia's Svetlana Kuznetsova during their first round tennis match of the WTA tournament on April 29, 2009 in Stuttgart. Kuznetsova won 6-4, 5-7, 6-1.

Getty Images 7 months ago

German Andrea Petkovic plays against Belgian Tamaryn Hendler her first round single game, at the tennis tournament in Torhout, on April 7, 2009.

Germany's Andrea Petkovic returns to France's Alize Cornet during their match at the Australian Open tennis tournament in Melbourne January 21, 2009.

Getty Images 10 months ago

Andrea Petkovic of Germany plays a stroke during her women's singles match against Alize Cornet of France at the Australian Open tennis tournament in Melbourne on January 21, 2009. Cornet won 6-1. 6-0.

Getty Images 10 months ago

Andrea Petkovic of Germany gestures after defeat in her women's singles match against Alize Cornet of France at the Australian Open tennis tournament in Melbourne on January 21, 2009. Cornet won 6-1. 6-0.

Getty Images 1 month ago

TOKYO - SEPTEMBER 30: Agnieszka Radwanska of Poland serves in her match against Andrea Petkovic of Germany during day four of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 30, 2009 in Tokyo, Japan.

Getty Images 1 month ago

TOKYO - SEPTEMBER 30: Andrea Petkovic of Germany plays a forehand in her match against Agnieszka Radwanska of Poland during day four of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 30, 2009 in Tokyo, Japan.

Getty Images 1 month ago

TOKYO - SEPTEMBER 30: Andrea Petkovic of Germany plays a forehand in her match against Agnieszka Radwanska of Poland during day four of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 30, 2009 in Tokyo, Japan.

Getty Images 1 month ago

TOKYO - SEPTEMBER 30: Andrea Petkovic of Germany plays a forehand in her match against Agnieszka Radwanska of Poland during day four of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 30, 2009 in Tokyo, Japan.

Getty Images 2 months ago

TOKYO - SEPTEMBER 30: Agnieszka Radwanska of Poland plays a forehand in her match against Andrea Petkovic of Germany during day four of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 30, 2009 in Tokyo, Japan.

Getty Images 2 months ago

TOKYO - SEPTEMBER 30: Agnieszka Radwanska of Poland plays a backhand in her match against Andrea Petkovic of Germany during day four of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 30, 2009 in Tokyo, Japan.

Getty Images 2 months ago

TOKYO - SEPTEMBER 30: Agnieszka Radwanska of Poland plays a forehand in her match against Andrea Petkovic of Germany during day four of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 30, 2009 in Tokyo, Japan.

Getty Images 2 months ago

TOKYO - SEPTEMBER 29: Magdalena Rybarikova (L) of Slovakia eats 'Futomaki', a Japanese Sushi roll, next to Andrea Petkovic of Germany after learning how to make it on the third day of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 29, 2009 in Tokyo, Japan.

Getty Images 2 months ago

TOKYO - SEPTEMBER 29: (L-R) Anastasia Pavlyuchenkova of Russia, Magdalena Rybarikova of Slovakia, Andrea Petkovic of Germany and Li Na of China pose with their 'Futomaki', Japanese Sushi rolls, after learning how to make them on the third day of the Toray Pan Pacific Open Tennis tourna...

Getty Images 2 months ago

TOKYO - SEPTEMBER 29: Andrea Petkovic (L) of Germany and Li Na (R) of China learn how to make 'Futomaki', Japanese Sushi rolls, on the third day of the Toray Pan Pacific Open Tennis tournament at Ariake Colosseum on September 29, 2009 in Tokyo, Japan.

Getty Images 2 months ago

TOKYO - SEPTEMBER 29: Anastasia Pavlyuchenkova (L) of Russia, Magdalena Rybarikova (3rd L) of Slovakia, Andrea Petkovic (3rd R) of Germany and Li Na (R) of China learn how to make 'Futomaki', Japanese Sushi rolls, on the third day of the Toray Pan Pacific Open Tennis tournament at Aria...

AP Photo 2 months ago

Andrea Petkovic of Germany returns the ball against Svetlana Kuznetsova of Russia during a first round of the Pan Pacific Open Tennis in Tokyo Monday, Sept. 28, 2009.

AP Photo 2 months ago

Andrea Petkovic of Germany returns the ball against Svetlana Kuznetsova of Russia during a first round of the Pan Pacific Open Tennis in Tokyo Monday, Sept. 29, 2009.

AP Photo 2 months ago

Svetlana Kuznetsova of Russia returns the ball against Andrea Petkovic of Germany during a first round of the Pan Pacific Open Tennis in Tokyo Monday, Sept. 28, 2009.

Getty Images 2 months ago

NEW YORK - AUGUST 31: Angelique Kerber of Germany returns a shot against Andrea Petkovic of Germany during day one of the 2009 U.S. Open at the USTA Billie Jean King National Tennis Center on August 31, 2009 in Flushing neighborhood of the Queens borough of New York City.