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Serena Williams of the United States plays a shot in her match against South Africa's Chanelle Scheepers during the Brisbane International tennis tournament in Brisbane, Australia, Monday, Jan 2, 2012. (AP Photo/Tertius Pickard)

Serena Williams of the United States plays a shot in her match against South Africa's Chanelle Scheepers during the Brisbane International tennis tournament in Brisbane, Australia, Monday, Jan 2, 2012. (AP Photo/Tertius Pickard)