Sinner Claims ATP No.1 After Paris Masters Win, Rivalry With Alcaraz Intensifies

Jannik Sinner and Carlos Alcaraz have established a dominant rivalry in men's tennis in 2025, splitting all Grand Slam titles and winning every tournament they both entered. Sinner reclaimed the ATP No. 1 ranking after his Paris Masters victory, but due to ranking points dropping off from last year's ATP Finals, Alcaraz will retake the top spot the following week, setting the stage for a decisive battle at the ATP Finals in Turin. Sinner's Paris Masters win marked his 14th top-10 victory this year, surpassing Alcaraz, and brought his total of 'Big Titles'—including Grand Slams, Masters 1000s, and ATP Finals trophies—closer to Alcaraz's tally. The ATP Finals will be pivotal as the two players, far ahead of their competitors, vie for year-end No. 1 honors and continue their rivalry that has reshaped men's tennis. Despite fierce competition, other players like Alexander Zverev and Felix Auger-Aliassime remain well behind in points and titles. The rivalry, dubbed "Sin-caraz," has turned men's tennis into a contest almost exclusively between these two athletes, with all eyes on their upcoming clash in Turin.