Amanda Anisimova becomes only player to beat all four 2025 Grand Slam women's champions this year

Having already lost her first round-robin match two days ago, Amanda Anisimova found herself with her back against the wall at the WTA Finals on Monday, trailing Madison Keys 6-4, 3-1 in her second round-robin match, just a few games away from dropping to 0-2 in her group.

But she turned it around, winning five games in a row to take the second set and then running away with the third set for a 4-6, 6-3, 6-2 victory.

"I feel like every time I come out here, my opponent's playing some crazy tennis," Anisimova said afterwards in her on-court interview.

"It's been a difficult few matches and today Maddie was playing so well, and it was quite a battle out there. I'm really happy with how I was able to turn it around in the second set, and kind of turn that frown upside down!"

But besides improving to 1-1 in her round-robin group, and now putting herself within one win of reaching the semifinals, Anisimova achieved something very unique on Monday—she's now the only player to defeat all four 2025 Grand Slam women's champions this year.

All of those wins have come in the last few months, too, and on big stages.

Anisimova defeated Aryna Sabalenka in the semifinals of Wimbledon, Iga Swiatek in the quarterfinals of the US Open, Coco Gauff in the semifinals of Beijing and now Keys in the round-robin stage of the WTA Finals.

Keys, Gauff, Swiatek and Sabalenka swept the majors this year at the Australian Open, Roland Garros, Wimbledon and the US Open, respectively.

And it's very possible that Anisimova remains the only player to complete this sweep, too, as the WTA Finals is the last WTA event of the season.

Elena Rybakina could still do it, as she already has wins this year against Sabalenka, Swiatek and Keys—she's not in the same group as Gauff here, so the Kazakh would have to get a win over her in the semifinals or final.

Jessica Pegula is only missing a win over Keys, but they're not in the same group either, and Keys has already been eliminated from advancing.

As for Anisimova, she and Swiatek—who are both 1-1 in their group, both with losses to Rybakina—will play each other Wednesday to join Rybakina as the two players who advance to the semifinals from their group.

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