Predicting Qualification Thresholds in UEFA's incomplete round-robin tournaments

David Winkelmann, Rouven Michels and Christian Deutscher

Papers from arXiv.org

Abstract: For the 2024/25 season, the Union of European Football Associations (UEFA) introduced an incomplete round-robin format in the Champions League, Europa League, and Conference League, replacing the traditional group stage with a single league table of all 36 teams. Under this structure, the top eight teams advance directly to the round of 16, while those ranked 9th-24th compete in a play-off round. Simulation-based analyses, such as those by commercial data analyst Opta, provide indicative point thresholds for qualification but reveal deviations when compared with actual outcomes in the first season. To overcome these discrepancies, we employ a bivariate Dixon-Coles model that accounts for the lower frequency of draws observed in the 2024/25 UCL season, with team strengths proxied by Elo ratings. This framework enables the simulation of match outcomes and the estimation of qualification thresholds for both direct advancement and play-off participation. Our results provide scientific guidance for clubs and managers, supporting strategic decision-making under uncertainty regarding their progression prospects in the new UEFA club competition formats.

Date: 2025-08, Revised 2025-09
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