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Rafael Nadal of Spain returns the ball during the men's singles second round match against Karen Khachanov of Russia at the China Open tennis tournament in Beijing on Oct. 5, 2017.Rafael Nadal won 2-0. (Xinhua/Zhang Chenlin)
Rafael Nadal of Spain returns the ball during the men's singles second round match against Karen Khachanov of Russia at the China Open tennis tournament in Beijing on Oct. 5, 2017.Rafael Nadal won 2-0. (Xinhua/Zhang Chenlin)