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Novak Djokovic of Serbia serves during the singles final against Karen Khachanov of Russia at ATP Paris Masters in Paris, France on Nov. 4, 2018. Djokovic lost 0-2. (Xinhua/Chen Yichen)
Novak Djokovic of Serbia serves during the singles final against Karen Khachanov of Russia at ATP Paris Masters in Paris, France on Nov. 4, 2018. Djokovic lost 0-2. (Xinhua/Chen Yichen)