Who will be the number one ranked ATP Tour player upon the conclusion of the 2025 Nitto ATP Finals?

Background

Jannik Sinner currently holds the ATP World No. 1 ranking after a stellar 2024 season that included winning the Nitto ATP Finals. Carlos Alcaraz and Novak Djokovic remain strong contenders, with Djokovic notably adding Andy Murray to his team and pursuing his 100th tour-level title. The rankings are determined by points earned in tournaments throughout the calendar year, with the most points awarded for Grand Slams and ATP 1000 events.

Resolution Criteria

This market will resolve based on the official ATP Tour rankings following the conclusion of the 2025 Nitto ATP Finals. The player ranked #1 in the ATP Singles Rankings at that time will be the winning answer. In the event of a tie in ranking points (which is extremely unlikely), the ATP's official tiebreaker rules will determine the #1 ranking.