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SHANGHAI, CHINA - OCTOBER 11: David Goffin of Belgium celebrates a point against Juan Martin Del Potro of Argentina of France during the Men's singles first round match on day three of Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 11, 2016 in Shanghai, China. (Photo by Lintao Zhang/Getty Images)

SHANGHAI, CHINA - OCTOBER 11:  David Goffin of Belgium celebrates a point against Juan Martin Del Potro of Argentina of France during the Men's singles first round match on day three of Shanghai Rolex Masters at Qi Zhong Tennis Centre on October 11, 2016 in Shanghai, China.  (Photo by Lintao Zhang/Getty Images)