
Wang Qiang of China serves during the women's singles first round match against Daria Kasatkina of Russia at the 2017 US Open tennis tournament in New York, the United States, Aug. 30, 2017. (Xinhua/Li Muzi)

Wang Qiang of China serves during the women's singles first round match against Daria Kasatkina of Russia at the 2017 US Open tennis tournament in New York, the United States, Aug. 30, 2017. (Xinhua/Li Muzi)