Heading in as the number 2 seed at the 2019 ITTF World Table Tennis Championships, Xu Xin was looking to prove himself during this competition. He participated in the men's singles and mixed doubles with Liu Shiwen. After the draw was made, Xu Xin was the only Chinese player in the bottom half of the draw. Because of the seedings, #1 Fan Zhendong, #3 Lin Gaoyuan, #9 Liang Jingkun, and #11 Ma Long were all drawn in the top half of the draw. Much pressure was placed on Xu to help achieve an all Chinese final, but was also a large opportunity for Xu Xin to perform well at a World Championships. Xu Xin won his first round 4–1 against Jan Zibrat and his second round 4–0 over Austria's Stefan Fegerl. However, Xu's road to the final was stopped by Frenchman Simon Gauzy 4–2. Gauzy outperformed Xu and Gauzy is even said to have "outspinned the spin master". Xu's shocking defeat meant that for the first time in over 15 years, there would not be an all Chinese final. The last time this happened was at the 2003 World Championships, where Austria's Werner Schlager faced off against Joo Saehyuk in the men's final. In the mixed doubles event, Xu did not falter, where Xu Xin and Liu Shiwen claimed victory 4–1 over Kasumi Ishikawa and Maharu Yoshimura.