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Fernando Verdasco of Spain reacts during his ATP World Tour Finals tennis match against Juan Martin Del Potro of Argentina in London, November 24, 2009. REUTERS/Suzanne Plunkett (BRITAIN SPORT TENNIS Stock Photo -
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Roger Federer of Switzerland returns the ball to Nikolay Davydenko of Russia during their ATP World Tour Finals semi-final tennis match in London, November 28, 2009. REUTERS/Suzanne Plunkett (BRITAIN SPORT TENNIS Stock
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Switzerland's Roger Federer celebrates winning the second set against Argentina's Juan Martin Del Potro during their ATP World Tour Finals tennis match at the 02 Arena in London November 26, 2009. REUTERS/Dylan
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Runnerup Juan Martin Del Potro Argentina Interviewed Editorial Stock Photo - Stock Image | Shutterstock
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