
Rafael Nadal of Spain hits a return during the men's singles first round match against Dusan Lajovic of Serbia at the 2017 US Open tennis tournament in New York, the United States, Aug. 29, 2017. (Xinhua/Wang Ying)

Rafael Nadal of Spain hits a return during the men's singles first round match against Dusan Lajovic of Serbia at the 2017 US Open tennis tournament in New York, the United States, Aug. 29, 2017. (Xinhua/Wang Ying)