The Wimbledon champion defeated Coco Gauff to top the group, knocking out the defending champion Swiatek, and will play Zheng Qinwen on Friday.

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

Gauff was already guaranteed to make the semis, but Swiatek needed the American to beat the eighth-seeded Czech Krejcikova who required a victory herself to progress