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

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