SINGAPORE (AP) — Sloane Stephens and Angelique Kerber both earned three-set victories at the WTA Finals on Wednesday to leave their group wide open ahead of the last round.
Stephens, who is making her debut at the year-end event, beat Kiki Bertens 7-6 (4), 2-6, 6-3 for her second straight victory in round-robin play.
Earlier, Kerber held her nerve and her serve to beat Naomi Osaka 6-4, 5-7, 6-4 after saving 13 of the 18 break points she faced, including five in the final game of the first set.
The results mean all four players could still advance to the semifinals. Stephens is the only player with a 2-0 record, with Kerber and Bertens at 1-1 and Osaka dropping to 0-2.
Stephens would have secured a semifinal spot if she had won in straight sets but Bertens managed to extend the match past midnight local…