NEW YORK (AP) — Novak Djokovic and Carlos Alcaraz have started their matchup in the U.S. Open men's semifinals Friday.

Defending champion Jannik Sinner meets Felix Auger-Aliassime in the second semifinal at Arthur Ashe Stadium.

All have won multiple Grand Slam titles except Auger-Aliassime, a 25-year-old from Canada trying to make it to his first major final.

Sinner vs. Auger-Aliassime is scheduled to begin after Alcaraz vs. Djokovic ends, but not before 7 p.m. EDT.

The two winners will face each other on Sunday for the title. Sinner could become the first repeat men's champion in New York since Roger Federer won the hard-court tournament five years in a row from 2004 through 2008.

Djokovic, who is 38, owns 24 singles trophies from the four most important tournaments in tennis, includ

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