Arsenal's dominant unbeaten run through the 2025/26 UEFA Champions League campaign, including a semifinal victory over Atletico Madrid, has positioned them as overwhelming favorites to lift the trophy without a defeat. The Gunners stand as the competition's sole remaining side with zero losses across the group stage, knockout rounds, and all matches played, reflecting superior form, defensive organization, and attacking efficiency against top European opposition. Trader consensus at 99.4% for an unbeaten champion stems directly from this historical context and Arsenal's strong record in decisive fixtures. A late injury to key personnel or an unexpected final result could still shift the outcome, though such scenarios remain low-probability given the current trajectory.