Novak Djokovic of Serbia celebrates after the third round singles match against Canadian Vasek Pospisil at the Shanghai Masters tennis tournament in Shanghai, east China, Oct. 13, 2016. Novak Djokovic won 2-0. (Xinhua/Fan Jun)
Novak Djokovic of Serbia celebrates after the third round singles match against Canadian Vasek Pospisil at the Shanghai Masters tennis tournament in Shanghai, east China, Oct. 13, 2016. Novak Djokovic won 2-0. (Xinhua/Fan Jun)