Chelsea boss Maurizio Sarri said Kepa Arrizabalaga's refusal to come off during the Carabao Cup final defeat to Manchester City was due to a "big misunderstanding".
Arrizabalaga defied his manager's orders late in extra time after receiving treatment for an apparent bout of cramp, despite the fourth official putting up his number on the board and Willy Caballero being primed to come on.
After the Spaniard, who was within his rights to decline the substitution according to International Football Association Board (IFAB) rules, stood his ground, Sarri stormed off down the tunnel, furious that the change was not made.