Highlights of men's singles semifinal match at 2019 ITTF Czech Open

Timo Boll (L) of Germany returns the ball during a men's singles semifinal match against Lin Yun-Ju of Chinese Taipei at the 2019 ITTF Czech Open in Olomouc, the Czech Republic, Aug. 25, 2019. (Xinhua/Shan Yuqi)