Novak Djokovic beats Kei Nishikori 3-0 at 2018 US Open tennis tournament

Novak Djokovic (R) of Serbia shakes hands with Kei Nishikori of Japan after their men's singles semifinal match at the 2018 US Open tennis tournament in New York, the United States, Sept. 7, 2018. Novak Djokovic won 3-0. (Xinhua/Wang Ying)