Xu was born in Zhongshan, and has won five singles and six doubles titles on the ITF Women's Circuit.

Partnering Sun Ziyue, Xu won her first $50k tournament at Sanya, defeating Yang Zhaoxuan and Zhao Yijing in the 2013 final.

Despite a difference of over 500 places in the world rankings, Xu won in straight sets,[1] but lost to Lyudmyla Kichenok in the final round.

Partnering Sun Ziyue again in doubles at the tournament, Xu was given a wild card into the main draw,[2] but couldn't make it past her fellow Chinese pairing of Wang Yafan and Zheng Jie,[2] who later made it to the semifinals.

[2] At the 2014 Summer Youth Olympics in Nanjing, Xu won the gold medal in girls' singles, having defeated Iryna Shymanovich of Belarus in straight sets in the final.