2025 WTA Finals – Singles

Elena Rybakina defeated Aryna Sabalenka in the final, 6–3, 7–6^(7–0) to win the singles tennis title at the 2025 WTA Finals. It was her 11th WTA Tour-level title, and she became the first Kazakhstani player and first player representing an Asian country to win the WTA Finals. By winning the title undefeated, Rybakina won $5.235 million USD in prize money, breaking the previous year's record for the largest prize money earned by a female tennis player at a single event.

Coco Gauff was the defending champion, but was eliminated in the round-robin stage.

Sabalenka was the first player to qualify for at least three consecutive editions as the top seed since Steffi Graf from 1993 to 1996, and the fourth woman to do so overall, after Chris Evert, Martina Navratilova and Graf. She was the first player to reach the final of three majors and the WTA Finals in the same season since Angelique Kerber in 2016.

Amanda Anisimova and Ekaterina Alexandrova (as an alternate) made their debuts in the singles competition. For the first time since 2002, four American women qualified for the singles competition. Madison Keys withdrew from the tournament before her final group match due to illness and was replaced by second alternate Alexandrova. First alternate Mirra Andreeva declined to serve as the replacement. As in the previous year, Jasmine Paolini was the only player to qualify for both the singles and doubles tournaments.