Coco Gauff earned her second victory over Iga Swiatek in 13 career matchups, winning 6-3, 6-4 at the WTA Finals on Tuesday to reach the semifinals of the season-ending tournament. The result means that Swiatek can't move up from No. 2 in the rankings this week, so Aryna Sabalenka will finish the year at No. 1 for the first time. It was Gauff’s first victory over Swiatek since the 2023 Cincinnati Open, snapping a four-match losing skid head-to-head.