2025 US Open – Men's singles

Carlos Alcaraz defeated defending champion Jannik Sinner in the final, 6–2, 3–6, 6–1, 6–4 to win the men's singles tennis title at the 2025 US Open. It was his second US Open title and sixth major title overall. By winning the title, Alcaraz regained the world No. 1 singles ranking from Sinner. Alcaraz was the youngest man to win a sixth major title since Björn Borg. Sinner was the fourth man in the Open Era to reach all four major finals in a season, and the youngest in the Open Era to reach five consecutive major finals. Alcaraz and Sinner became the first pair of men's singles players in the Open Era to contest three major finals in the same year. For the first time since the introduction of the current ATP rankings in 1973, the world No. 1 and No. 2 contested all four major finals in a season.