Del Potro beats Borna Coric at 2018 US Open men's singles 4th round match

Juan Martin del Potro of Argentina hits a return during the men's singles fourth round match against Borna Coric of Croatia at the 2018 US Open in New York, the United States, Sept. 2, 2018. Del Potro won 3-0. (Xinhua/Li Muzi)