Kepa was furious.
Wildly gesticulating with his arms, the world's most expensive goalkeeper forcibly indicated to Sarri he would be ready to face penalties against Manchester City with the Wembley showpiece locked at 0-0 and extra time about to end.
But Sarri was determined to bring on Willy Caballero, who saved three spot kicks in the 2016 League Cup final while in City's winning side.
So Kepa, who joined Chelsea in August for €80 million (then NZ$132.5 million), simply refused to leave the field.
