Krejcikova, the Wimbledon champion, won the Orange Group and will face Zheng in Friday's semifinals, while Gauff will take on Purple Group winner Sabalenka

Krejcikova beat Gauff to seal a semifinal ticket at the WTA Finals and prevent Swiatek from making the knockout stage.

Defending WTA Finals champion Iga Swiatek was eliminated from the season-ending championship on Thursday after Barbora Krejcikova's 7-5 6-4 win over Coco Gauff meant the Polish world number two failed to advance to the last four.