Andrea Petkovic of Germany celebrates after beating Maria Sharapova of Russia during their fourth round match at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 23, ... more 
Andrea Petkovic of Germany celebrates after beating Maria Sharapova of Russia during their fourth round match at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 23, 2011. less 
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Associated Press | Photo By John Donegan
Sun, Jan 23, 2011 5:12 AM EST