Spain's Rafael Nadal plays a return to Novak Djokovic of Serbia during 

Spain's Rafael Nadal plays a return to Novak Djokovic of Serbia during their final match of the Monte Carlo Tennis Masters tournament in Monaco, Sunday, April 21, 2013. (AP Photo/Claude Paris)
Associated Press
Spain's Rafael Nadal plays a return to Novak Djokovic of Serbia during their final match of the Monte Carlo Tennis Masters tournament in Monaco, Sunday, April 21, 2013. (AP Photo/Claude Paris)
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