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Refusing substitution during the 2019 Carabao Cup final, Kepa Arrizabalaga defied manager Maurizio Sarri's decision to replace him with Willy Caballero. This act of defiance caused a stir, as it challenged the authority of the manager and led to speculation about Kepa's future at the club. The incident highlighted the tension between player power and managerial control, and raised questions about the role of the goalkeeper in modern football.