Overview
- Elena Rybakina beat Ekaterina Alexandrova 6-4, 6-4 to finish 3-0 in the Serena Williams Group and extend her winning run to nine matches.
- Amanda Anisimova rallied past Iga Swiatek 6-7 (3), 6-4, 6-2 in a winner-take-all clash to secure the second semifinal berth from the group.
- Swiatek was eliminated in the round-robin stage for a second straight year after losing consecutive matches from a set up for the first time in her career.
- Madison Keys withdrew from her scheduled match with a viral illness after signaling she was unwell earlier in the week and issuing a statement of disappointment.
- First alternate Mirra Andreeva was not fit to play, so Alexandrova made her WTA Finals debut as the second alternate, while Aryna Sabalenka leads the other group following a three-set win over Jessica Pegula.