Updated

Mirra Andreeva beat world number two Aryna Sabalenka 6-4 6-0 at the WTA Finals, winning 11 straight games to reach the semi-finals. Andreeva, the 19-year-old French Open champion, was 4-1 down in the opening set before producing superb tennis, hitting 16 winners to six unforced errors, while Sabalenka hit 23 unforced errors and no aces. Andreeva said she could not take all the credit, saying Sabalenka had not had her best day. BBC Sport described Sabalenka's display as increasingly erratic and similar to some of her collapses this year, though she had taping on her knee that did not appear to hinder her. Andreeva goes through as group winner, and the winner of Sabalenka's final group match against Elina Svitolina on Friday also advances. Svitolina beat Karolina Muchova 3-6 6-2 6-2 after a medical timeout for a right hip injury in the first set.