Top female tennis stars compete in Doha

Serena Williams, Sam Stosur and Victoria Azarenka among big names in action in Qatar Open
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Serena Williams of the US serves the ball to Poland's Urszula Radwanska during their WTA Qatar Open tennis match on February 14, 2013 in the Qatari capital, Doha. Williams won the match 6-0, 6-3. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Al-Gharafa's French striker Djibril Cisse (L) attends the tennis match between Poland's Urszula Radwanska and Serena Williams of the US in WTA Qatar Open on February 14, 2013 in the Qatari capital Doha. Williams won the match 6-0, 6-3. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Poland's Urszula Radwanska gestures during her WTA Qatar Open tennis match against Serena Williams of the US on February 14, 2013 in the Qatari capital, Doha. Williams won the match 6-0, 6-3. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Russian Maria Sharapova serves to Czech Klara Zakopalova during their WTA Qatar Open tennis match on February 14, 2013 in the Qatari capital, Doha. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Sara Errani of Italy returns the ball to Daniela Hantuchova of Slovakia during their WTA Qatar Open tennis match on February 14, 2013 in the Qatari capital, Doha. Errani won the match 7-5, 5-7, 6-2. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Daniela Hantuchova of Slovakia returns the ball to Sara Errani of Italy during their WTA Qatar Open tennis match on February 14, 2013 in the Qatari capital, Doha. Errani won the match 7-5, 5-7, 6-2. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Samantha Stosur of Australia returns the ball to Svetlana Kuznetsova of Russia during their WTA Qatar Open tennis match on February 14, 2013 in the Qatari capital, Doha. Stosur won the match 6-4, 7-5. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Christina Mchale of US returns the ball to Victoria Azarenka of Belarus during their WTA Qatar Open tennis match on February 14, 2013 in the Qatari capital, Doha. (Photo by KARIM JAAFAR/AFP/Getty Images)
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Victoria Azarenka of Belarus returns the ball to Christina Mchale of US during their WTA Qatar Open tennis match on February 14, 2013 in the Qatari capital, Doha. Azarenka won the match 6-0, 6-0. (Photo by KARIM JAAFAR/AFP/Getty Images)