Will Arsenal win the 2025–26 Champions League?

Analysis

The Polymarket odds (26.5%) reflect Arsenal’s much improved European stature, recent group dominance, and possession of elite roster depth. Models putting their probability in the 22-28% range reveal that sharp quantitative consensus has Arsenal as a major contender. However, betting markets typically incorporate this information and are rarely mispriced by large margins, so a rigorous approach requires evaluating whether there’s credible reason to lean much higher or lower. First, history is instructive: In 29 modern Champions League seasons, only 6 have seen the pre-quarterfinals favorite win (about 21%), and never in the last decade has a team not named Real Madrid, Barcelona, Liverpool, Chelsea, or Bayern lifted the trophy. Arsenal have reached only one final (2006) and have not surpassed the semifinals since. Path dependence bites hard: Knockouts – especially the quarters and semis – are hostile to even the best teams, due to variance, game states, and the quality of likely opposition. Second, the 2025–26 field is brutal. Bayern Munich have crushed their Round of 16 opposition and project as equally strong, if not stronger, than Arsenal. PSG, Real Madrid, and a resurgent Barcelona all have talent, pedigree, and tactical upside. Even sides like Liverpool, Manchester City, or Atlético Madrid can never be ignored in these stages. Most advanced stats models adjust Arsenal’s chances down after the knockout bracket is finalized, reflecting the collective strength of the re