Maria Sharapova of Russia serves to Dominika Cibulkova of Slovakia during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Eugene Hoshiko)

Australian Open Tennis

Maria Sharapova of Russia serves to Dominika Cibulkova of Slovakia during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Eugene Hoshiko)

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