Novak Djokovic of Serbia serves to Jerzy Janowicz of Poland during a match of the men's singles first round at the 2016 U.S. Open in New York, the United States, Aug. 29, 2016. Novak Djokovic won 3-1. (Xinhua/Qin Lang)
1st round of U.S. Open held in New York
Source:Xinhua
2016-08-30 10:00:29
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