
Timo Boll of Germany competes during the men's singles match against Jang Woojin of South Korea at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 2, 2017. (Xinhua/Luo Huanhuan)
Timo Boll of Germany competes during the men's singles match against Jang Woojin of South Korea at the 2017 World Table Tennis Championships in Dusseldorf, Germany, June 2, 2017. (Xinhua/Luo Huanhuan)