At 24, he's the youngest player EVER to achieve the feat.

And no other man will even come close to that this year.

At 22, he's younger than any of the Big 3 were when they hit that number—and anyone since the 1980s, for that matter.

The Kazakh is also the only player who managed to defeat Sabalenka twice this year, and it was very nearly three times.

She's just the fifth woman ever to reach the semis or better at all four Grand Slams and the WTA Finals in multiple seasons.

Having already beaten Sabalenka, Swiatek and Gauff this year, she completed the set with her win over Keys at the WTA Finals.

She stormed past the No. 4-ranked American, 6-3, 6-1, in her opening match at the WTA Finals on Saturday.

The 24-year-old Italian is the first man born in the 2000s—or even in 1998 or later—to reach that incredible milestone.

The Australian is just the second man born in 1999 or later to hit that number, after Jannik Sinner.

His victory at the indoor event also brought him his first title in almost two and a half years, since Rome in May of 2023.

The former No. 1 is just the second man born in 1990 or later to reach that milestone, after Alexander Zverev.