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Spain's Rafael Nadal poses with kids before the second round match against Jared Donaldson of the United States at 2017 ATP Shanghai Rolex Masters in Shanghai, east China, Oct. 11, 2017. (Xinhua/Fan Jun)

Spain's Rafael Nadal poses with kids before the second round match against Jared Donaldson of the United States at 2017 ATP Shanghai Rolex Masters in Shanghai, east China, Oct. 11, 2017. (Xinhua/Fan Jun)