- Swiatek exits on sets percentage despite routing Kasatkina
- Krejcikova and Gauff progress to the semi-finals
The defending champion, Iga Swiatek, was knocked out of the WTA Finals after Barbora Krejcikova defeated Coco Gauff to book her spot in the last four.
Swiatek had earlier needed less than an hour to dispatch Daria Kasatkina, who had replaced the injured Jessica Pegula, 6-1, 6-0 in the opening match of the day in Riyadh.