
Madison Keys of the United States hits a return to Duan Yingying of China during a women's singles first round match at the China Open tennis tournament in Beijing, capital of China, Oct. 2, 2016. Keys won 2-1. (Xinhua/Ju Huanzong)

Madison Keys of the United States hits a return to Duan Yingying of China during a women's singles first round match at the China Open tennis tournament in Beijing, capital of China, Oct. 2, 2016. Keys won 2-1. (Xinhua/Ju Huanzong)
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