
Timo Boll of Germany serves the ball during the men's singles final against his compatriot Dimitrij Ovtcharov at the ITTF China Open Table Tennis tournament in Chengdu, capital of southwest China's Sichuan Province, June 25, 2017. (Xinhua/Liu Kun)

Timo Boll of Germany serves the ball during the men's singles final against his compatriot Dimitrij Ovtcharov at the ITTF China Open Table Tennis tournament in Chengdu, capital of southwest China's Sichuan Province, June 25, 2017. (Xinhua/Liu Kun)