Dinara Safina of Russia serves shortly before retiring from her singles tennis match against Serbia's Jelena Jankovic...

...the Khalifa International Tennis and Squash Complex in Doha, Qatar on October 28, 2009. Russia's Dinara Safina hobbled out of the WTA Championships, tearfully surrendering the year-end world number one ranking to...

...Williams of United States, Svetlana Kuznetsova of Russia, Elena Dementieva of Russia, Victoria Azarenka of Belarus, Dinara Safina of Russia, Jelena Jankovic of Serbia, Caroline Wozniacki of Denmark and Venus William of United States...

BEIJING - OCTOBER 05: Dinara Safina of Russia returns a shot against Zhang Shuai of China in her second round match during...

...Mandatory Credit: Steve Bardens/Offside Sports via US PRESSWIRE 2- Aug 19, 2009; Toronto, ON, Canada; Dinara Safina (RUS) reacts after winning a point Aravane Rezai (FRA) during their match at the Rogers Cup...

BERLIN - MAY 08: Justin Henin of Belgium in action against Dinara Safina of Russia during day four of the Women's Qatar Telecom German Open at the Rot...

BERLIN - MAY 08: Justin Henin of Belgium in action against Dinara Safina of Russia during day four of the Women's Qatar Telecom German Open at the Rot...

...BERLIN - MAY 08: Justin Henin of Belgium in action against Dinara Safina of Russia during day four of the Women's Qatar Telecom German Open at the Rot...

NEW YORK - AUGUST 30: Dinara Safina of Russia wipes sweat off her face against Timea Bacsinszky of Switzerland during Day 6 of...

Number one seeded Dinara Safina of Russia reacts to a point during her match against Petra Kvitova of the Czech Republic...

...L)ber one seeded Dinara Safina of Russia reacts to a point during her match against Petra Kvitova of the Czech Republic...

EW YORK - SEPTEMBER 05: Dinara Safina of Russia returns a shot to Petra Kvitova of the Czech Republic during day six of...

Top-seeded Dinara Safina of Russia reacts during her match against Kristina Barrois of Germany during the second round of...

Top seeded Dinara Safina of Russia returns to Kristina Barrois of Germany during the second round of the U.S...

Top-seeded Dinara Safina of Russia reacts during her match against Kristina Barrois of Germany during the second round of...