Jannik Sinner signs off his 2025 season in style by overcoming world number one Carlos Alcaraz in two tight sets to defend his ATP Finals crown in Turin.

Alcaraz, who has won four of his five meetings with Sinner this season – and 70 matches overall for this season as well – beat Lorenzo Musetti 6-4, 6-1 at the ATP Finals in Turin.

Carlos Alcaraz beats out Jannik Sinner to number one spot after the Spaniard defeated Lorenzo Musetti in Turin, Italy.