ATP 2026 End of Year Rankings: Player to be Number 1

This market will resolve according to the player who finishes World No. 1 in the official 2026 ATP year-end singles rankings, as published by the ATP at the conclusion of 2026. If the 2026 year-end rankings are not published, are canceled, or a year-end No. 1 has not been determined by January 14 2027, 11:59 PM ET, this market will resolve to "Other." If multiple players are tied and officially recognized as co-No. 1, this market will resolve in favor of the player whose listed name comes firs