Maria Sharapova of Russia hits a forehand return to Karin Knapp of Italy during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014.(AP Photo/Aaron Favila)
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Maria Sharapova of Russia hits a forehand return to Karin Knapp of Italy during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014.(AP Photo/Aaron Favila)
