2013 Partnering
Sun Ziyue, Xu won her first $50k tournament at Sanya, defeating
Yang Zhaoxuan and
Zhao Yijing in the
2013 final.
2014 At the
Shenzhen Open, Xu made her
WTA Tour debut. Having been given a wild card into qualifying for the
singles main draw, she was drawn against Britain's
Johanna Konta. Despite a difference of over 500 places in the world rankings, Xu won in straight sets, 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, but couldn't make it past her fellow Chinese pairing of
Wang Yafan and
Zheng Jie, who later made it to the semifinals. 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. ==WTA Tour finals==