
Germany's Timo Boll competes during the men's singles first round match against Gavin Rumgay of Scotland at the 2017 World Table Tennis Championships in Dusseldorf, Germany, on May 31, 2017. Timo Boll won by 4-0. (Xinhua/Luo Huanhuan)

Germany's Timo Boll competes during the men's singles first round match against Gavin Rumgay of Scotland at the 2017 World Table Tennis Championships in Dusseldorf, Germany, on May 31, 2017. Timo Boll won by 4-0. (Xinhua/Luo Huanhuan)