Jannik Sinner has now won back-to-back ATP Finals titles without dropping a set

Jannik Sinner has successfully defended his title at the ATP Finals, completing the mission with a 7-6 (4), 7-5 championship victory over Carlos Alcaraz on Sunday.

And with that, he joins a very exclusive list—he's the first player this century, and just the second player ever, to win back-to-back ATP Finals titles without dropping a set.

The only other player to do it was Ivan Lendl, who did it in 1985 (when the event was a 16-player elimination draw with four rounds) and 1986 (when it switched back to the current format of three round-robin matches, then the semifinals and final).

The first edition of the ATP Finals was held in 1970.

PLAYERS TO WIN ATP FINALS WITHOUT DROPPING A SET (since 1970):

• Ivan Lendl [3 times: 1982, 1985, 1986]
• John McEnroe [1 time: 1983]
• Jannik Sinner [2 times: 2024, 2025]

Alcaraz nearly ended this stat—the Spaniard held a set point in the first set, with Sinner serving at 5-6, ad-out. But the Italian saved it, held, won the tie-break and then battled back from an early break down in the second set to win in straight sets.

He's now won 20 sets in a row at the ATP Finals, the second-longest set streak in tournament history after Lendl's 24 in a row between 1985 and 1987.

"Celebrating with this trophy at the end of the year, especially after such an intense last couple of months, there's no better ending for me this season," Sinner said after the match.

"It was a very, very tough and close match-up, with set point in the first set. I'm just happy how I handled the situation."

Last year, Sinner was never even pushed past 6-4 in any set in Turin. This year, it happened several times—his 7-5, 6-1 and 6-3, 7-6 (3) wins over Felix Auger-Aliassime and Ben Shelton in the round-robin stage, his 7-5, 6-2 victory over Alex de Minaur in the semifinals, then the aforementoned final scoreline.