Novak Djokovic of Serbia plays a return to Mikhail Youzhny of Russia during their match of the Monte Carlo Tennis Masters tournament in Monaco, Wednesday, April 17, 2013. (AP Photo/Lionel Cironneau)

Associated Press
Novak Djokovic of Serbia plays a return to Mikhail Youzhny of Russia during their match of the Monte Carlo Tennis Masters tournament in Monaco, Wednesday, April 17, 2013. (AP Photo/Lionel Cironneau)
Novak Djokovic of Serbia plays a return to Mikhail Youzhny of Russia during their match of the Monte Carlo Tennis Masters tournament in Monaco, Wednesday, April 17, 2013. (AP Photo/Lionel Cironneau)
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