Vaclav Safranek of the Czech Republic hits a return during the men's singles first round match against Grigor Dimitrov of Bulgaria at the 2017 U.S. Open in New York, the United States, Aug. 30, 2017. (Xinhua/Qin Lang)
In pics: 1st round matches at 2017 US Open
Source: Xinhua| 2017-08-31 11:36:16|Editor: Yurou
KEY WORDS: US Open
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