The world's best tennis players show their intensity on the clay courts at Roland Garros during the 2013 French Open in Paris.
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Serbian Novak Djokovic hits a shot during his French Open men's second round match against Guido Pella of Argentina at Roland Garros in Paris on May 30, 2013. Djokovic defeated Pella 6-2, 6-0, 6-2. UPI/David Silpa
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