after securing two itf tournament wins in 2017, liu was granted a wild card into the qualifying for the us open. she defeated all three of her opponents in the qualifying tournament, earning her a spot in the singles main draw of a grand slam championship for the first time. there she was defeated in the first round, in straight sets by duan yingying. in their grand slam doubles main-draw debut, liu and taylor johnson lost in the first round in women's doubles at the us open.