Russia's Maria Sharapova serves during a practice session at Melbourne Park during her preparation for next week's Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 10, 2013. (AP Photo/Mark Baker)

Associated Press
Russia's Maria Sharapova serves during a practice session at Melbourne Park during her preparation for next week's Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 10, 2013. (AP Photo/Mark Baker)
Russia's Maria Sharapova serves during a practice session at Melbourne Park during her preparation for next week's Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 10, 2013. (AP Photo/Mark Baker)
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