
Ma Long (R) of China competes during the men's singles match against Anton Kallberg of Sweden at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 1, 2017. (Xinhua/Tao Xiyi)

Ma Long (R) of China competes during the men's singles match against Anton Kallberg of Sweden at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 1, 2017. (Xinhua/Tao Xiyi)