
Ma Long of China competes during the men's singles match against Timo Boll of Germany at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 4, 2017. (Xinhua/Tao Xiyi)

Ma Long of China competes during the men's singles match against Timo Boll of Germany at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 4, 2017. (Xinhua/Tao Xiyi)