US Open: Cilic advances to next round due to Copil's retirement

Marin Cilic of Croatia hits a return during the men's singles first round match against Marius Copil of Romania at the 2018 US Open tennis championships in New York, the United States, Aug. 28, 2018. Copil retired in the third set due to the injury, so Cilic won and advanced to the next round. (Xinhua/Liu Jie)