WTA Finals: Gauff defeats Swiatek to reach semifinals, Sabalenka assured of No. 1

Coco Gauff earned her second victory over Iga Swiatek in 13 career matchups, winning 6-3, 6-4 at the WTA Finals 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. Gauff, the 2023 US Open champion, also put an end to five-time Grand Slam champ Swiatek's six-match unbeaten run at the WTA Finals, an event the Polish star won a year ago.

The win moved Gauff to 2-0 in the Orange Group, while Swiatek fell to 1-1. Swiatek had rallied to beat Barbora Krejcikova in three sets on Sunday in her first match in two months.

Krejcikova, the Wimbledon champion, kept her chances of advancing alive with a 6-3, 6-3 win over Jessica Pegula. That eliminated Pegula, who lost in straight sets to Gauff in their opening match in Saudi Arabia.

Krejcikova was the last player to qualify for the event for the top eight players on the women's tennis tour, earning her berth thanks to her Grand Slam title at the All England Club in July. At No. 13, she became the lowest-ranked player to win a WTA Finals match since Magda Maleeva 22 years ago.