**Jannik Sinner’s season-ending knee injury removes the two-time defending champion who had compiled unbeaten runs through the Nitto ATP Finals in recent years.** This leaves an open field led by Alexander Zverev, fresh off Roland Garros and US Open titles and atop the Race to Turin, alongside Carlos Alcaraz, Ben Shelton, Flavio Cobolli, and other qualifiers or near-qualifiers. The round-robin format plus knockout stages demands five straight wins for an unbeaten champion, a feat made more challenging by the depth and recent form of multiple contenders. Trader consensus at 60% for “Yes” reflects the absence of a single dominant force while acknowledging that consistent indoor hard-court performers still hold realistic paths to a perfect record.