liu won the junior wimbledon doubles tournament in 2016 with fellow american usue arconada, defeating mariam bolkvadze and caty mcnally in straight sets in the final. the following year after losing in the junior french open final to whitney osuigwe, she came back to win the wimbledon singles title against ann li, making her the first american girl to win the event since chanda rubin in 1992. with this grand slam success, liu rose to no. 1 in the itf girls' junior rankings.