ATP Finals 2013: Roger Federer v Juan Martin del Potro | London, Juan Martín del Potro, Roger Federer | Relive the final 15 minutes of an epic encounter in London as Roger
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Guillermo Garcia-Lopez of Spain returns the ball to Ernests Gulbis of Latvia during the St. Petersburg Open ATP tennis tournament final match in St.Petersburg, Russia, Sunday, Sept. 22, 2013. (AP Photo/Dmitry Lovetsky
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Rafael Nadal 2013 ATP World Tour Finals Tennis ATP Beijing, rafael nadal, tshirt, jersey, arm png | PNGWing
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Rafael Nadal and Novak Djokovic ready for ATP World Tour Finals summit | ATP World Tour Finals | The Guardian
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ATP World Tour Finals 2013: Rafael Nadal secures end of year world No 1 ranking with victory over Stanislas Wawrinka | The Independent | The Independent
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