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Japan's Kei Nishikori hits a return during the men's singles second round match against China's Wu Yibing at the Shanghai Masters tennis tournament on Oct. 10, 2018. Kei Nishikori won 2-1. (Xinhua/Fan Jun)
Japan's Kei Nishikori hits a return during the men's singles second round match against China's Wu Yibing at the Shanghai Masters tennis tournament on Oct. 10, 2018. Kei Nishikori won 2-1. (Xinhua/Fan Jun)