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SHANGHAI, CHINA - OCTOBER 12: Roger Federer of Switzerland returns a shot during his final match against Gilles Simon of France during the day 8 of the Shanghai Rolex Masters at the Qi Zhong Tennis Center on October 12, 2014 in Shanghai, China. (Photo by Zhong Zhi/Getty Images)

SHANGHAI, CHINA - OCTOBER 12: Roger Federer of Switzerland returns a shot during his final match against Gilles Simon of France during the day 8 of the Shanghai Rolex Masters at the Qi Zhong Tennis Center on October 12, 2014 in Shanghai, China. (Photo by Zhong Zhi/Getty Images)