Chelsea fans were screaming: "You don't know what you're doing!" to Pochettino after replacing Mudryk

Chelsea midfielder Mykhailo Mudryk was substituted in the 78th minute of the FA Cup quarter-final match against Leicester (4-2).

Mauricio Pochettino and Mykhailo Mudryk

Karni Chukwuemeka came on instead of the Ukrainian. Chelsea fans greeted the substitution with whistles and shouts: "You don't know what you're doing!" at the head coach Mauricio Pochettino.

Mudryk was substituted with the score at 2-2. Chukwuemeka scored Chelsea's third goal, and Noni Madueke, who replaced Raheem Sterling in the 86th minute, scored the fourth.