There is a lot at stake when No. 1 Jannik Sinner meets No. 2 Carlos Alcaraz in the U.S. Open men’s final

Jannik Sinner, of Italy, reacts after scoring a point against Felix Auger-Aliassime, of Canada, during the men's singles semifinals of the U.S. Open tennis championships, Friday, Sept. 5, 2025, in New York. (AP Photo/Yuki Iwamura)

NEW YORK (AP) — There is a lot at stake when No. 1 Jannik Sinner meets No. 2 Carlos Alcaraz in the U.S. Open men's final on Sunday — with President Donald Trump expected to be at Arthur Ashe Stadium.

Sinner, a 24-year-old from Italy, is trying to become the first repeat men's champion at Flushing Meadows since Roger Federer won five championships in a row there from 2004 through 2008.

He's also bidding for his third Grand Slam title of the season, after the Australian Open and Wimbledon, and fifth of his career.

Alcaraz, a 22-year-old from Spain, is seeking his sixth major trophy overall and second of 2025, after the French Open. His first Slam title came in New York in 2022 as a teenager — after defeating Sinner in the quarterfinals.

Even though both are quite young, theirs is already quite a remarkable rivalry.

Sunday's showdown represents the first time in tennis history that the same two men played each other in three consecutive Grand Slam finals within a single season.

This hard-court matchup follows Alcaraz’s victory over Sinner erasing a trio of match points on the French Open’s red clay in June, and Sinner’s victory over Alcaraz on Wimbledon’s grass in July.

So this is a tiebreaker of sorts. Plus the winner will be at No. 1 in the rankings on Monday.

No matter who comes out on top, this is the eighth consecutive major title — and 10th of the past 13 — that will end up in the hands of Sinner or Alcaraz.

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Carlos Alcaraz, of Spain, reacts after defeating Novak Djokovic, of Serbia, during the men's singles semifinals of the U.S. Open tennis championships, Friday, Sept. 5, 2025, in New York. (AP Photo/Kirsty Wigglesworth)

Sunday's match is Sinner's fifth final in a row at the biggest events in tennis, a run that began with his title at the U.S. Open a year ago. Since the start of that tournament, he has won 33 of 34 matches at the majors. The loss? To Alcaraz at Roland-Garros.

Over the last two seasons, Sinner is 1-6 against Alcaraz and 109-4 against everyone else.

Alcaraz, meanwhile, has won 36 of 37 contests since May. The loss? To Sinner at the All England Club — also Alcaraz’s first defeat in a Slam final. Alcaraz leads the tour in wins (60) and titles (six) in 2025 and has reached the finals at his past eight tournaments.

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Howard Fendrich has been the AP’s tennis writer since 2002. Find his stories here: https://apnews.com/author/howard-fendrich. More AP tennis: https://apnews.com/hub/tennis

FILE - Winner Spain's Carlos Alcaraz, right, and Italy's Jannik Sinner hug after the final match of the French Tennis Open at the Roland-Garros stadium in Paris, June 8, 2025. (AP Photo/Thibault Camus, File)