Russia's Maria Sharapova reacts during her third round match against Venus Williams of the US at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 18, 2013. (AP Photo/Dita Alangkara)

Associated Press
Russia's Maria Sharapova reacts during her third round match against Venus Williams of the US at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 18, 2013. (AP Photo/Dita Alangkara)
Russia's Maria Sharapova reacts during her third round match against Venus Williams of the US at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 18, 2013. (AP Photo/Dita Alangkara)
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