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Novak Djokovic of Serbia returns the ball during the men's singles final match against Borna Coric of Croatia at 2018 ATP Shanghai Masters tennis tournament in Shanghai, east China, Oct. 14, 2018. (Xinhua/Fan Jun)
Novak Djokovic of Serbia returns the ball during the men's singles final match against Borna Coric of Croatia at 2018 ATP Shanghai Masters tennis tournament in Shanghai, east China, Oct. 14, 2018. (Xinhua/Fan Jun)