
Timo Boll of Germany competes during the men's singles match against Marcos Freitas of Portugal at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 3, 2017. Timo Boll won 4-1. (Xinhua/Tao Xiyi)

Timo Boll of Germany competes during the men's singles match against Marcos Freitas of Portugal at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 3, 2017. Timo Boll won 4-1. (Xinhua/Tao Xiyi)