This market will resolve to "Yes" if the 2026 Nitto ATP Finals singles champion goes unbeaten in every match during the 2026 Nitto ATP Finals, currently scheduled for November 15 to November 22, 2026, in Turin, Italy. Otherwise, this market will resolve to "No". "Unbeaten" means the champion did not record a loss in any singles match they played at the 2026 Nitto ATP Finals, across the round-robin stage, the semifinals, and the final (a 5-0 record for a player who plays all five matches). A loss by retirement or walkover counts as a loss. A champion who entered the tournament as an alternate is unbeaten only if they did not lose any match they played. If the 2026 Nitto ATP Finals are canceled, postponed after December 6, 2026, 11:59 PM ET, or there is no confirmed unbeaten champion within that timeframe, this market will resolve to "No". The resolution source for this market will be official information from the ATP Tour (https://www.atptour.com); however, a consensus of credible reporting may also be used.