Roger Federer of Switzerland returns the ball against Britain's Andy Murray during the 2008 Tennis Masters Cup in Shanghai on November 14, 2008 - Photogallery
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Juan Martin del Potro of Argentina returns a shot to Nikolay Davydenko of Russia during their Masters Cup tennis match in Shanghai November 13, 2008. REUTERS/Nir Elias (CHINA Stock Photo - Alamy
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