Liu Shiwen
The following week at the Korea Open, Xu Xin once again claimed the singles title in the final, defeating his good-friend Ma Long in the final. Coming into the final, Xu Xin had lost his six previous encounters against Ma Long on the international stage, and Ma was heavily regarded as the favorite to win. After an amazing match, Xu Xin said that "Winning the title is not the reason I am feeling so happy. It’s because I beat Ma Long", paying homage to Ma Long's dominance over the past years. Xu Xin again won the men's doubles title with Fan Zhendong, but in the mixed doubles Xu Xin and Liu Shiwen were defeated by Wong Chun Ting and Doo Hoi Kem at the final stage. This marked the first ever loss for the pairing of Xu Xin and Liu Shiwen, recent mixed doubles world champions at the 2019 ITTF World Table Tennis Championships.