Jannik Sinner leads the 2026 US Open winner market with a 46% implied probability, driven by his current world number one ranking, multiple recent Grand Slam titles, and proven hard-court consistency during the ATP Tour's North American swing. Carlos Alcaraz follows at 33.5%, supported by his explosive baseline game, strong head-to-head results in major events, and continued high-level form across surfaces. Novak Djokovic's 4.3% reflects his extensive experience at Flushing Meadows but accounts for the effects of age on recovery and scheduling. Lower odds for players like Alexander Zverev and Daniil Medvedev tie to inconsistent recent results and past injury concerns, while emerging names such as Joao Fonseca and Jakub Mensik show promise yet lack the proven Grand Slam track record needed to challenge the top tier ahead of the hard-court season.