UEFA Champions League entry has not satisfied strategy-proofness in three seasons.
Survey of sport ranking rules from a theoretical perspective can reveal their possible unintended consequences. The importance of incentive compatibility seems to be beyond dispute as the act of deliberately dropping points or losing a game in order to gain some other advantage is seen as being against the spirit of the game. This paper investigates the entry rules of the UEFA Champions League, the most prestigious club competition in European football with respect to strategy-proofness. We find that in three seasons (2015-16, 2016-17, 2017-18), the UEFA Europa League titleholder might have an incentive to lose its match against the Champions League titleholder in their domestic championship.
Publisher URL: http://arxiv.org/abs/1801.06644