Djokovic beats Del Potro to win third US Open title

Juan Martin del Potro of Argentina hits a return during the men's singles final against Novak Djokovic of Serbia at the 2018 US Open tennis championships in New York, the United States, Sept. 9, 2018. Djokovic claimed the title by defeating Juan Martin del Potro with 3-0 in the final. (Xinhua/Wang Ying)