Stan Wawrinka beats Ryan Harrison 2-0 at 2019 ATP Mexican Open

Ryan Harrison of United States serves during the men's singles first round match between Stan Wawrinka of Switzerland and Ryan Harrison of the United States at the 2019 ATP Mexican Open tennis tournament in Acapulco, Mexico, on Feb. 25, 2019. Stan Wawrinka won 2-0. (Xinhua/Xin Yuewei)