Everton boss Carlo Ancelotti was furious at full-back Djibril Sidibe after his substitution onto the pitch was delayed because he left his sock in the dressing room.
Sidibe was about to replace the injured Theo Walcott in the first half but realised he had forgotten his left sock which led to an animated reaction from Ancelotti.
The defender disappeared down the tunnel and emerged minutes later to help Everton secure a 3-1 victory over Crystal Palace at Goodison Park.
The win helped Ancelotti find the funny side of the substitution when he was asked about it during a post-match news conference.
"He forgot the socks," he said. "A new experience for me. Also for him, I think."
"The keeper can make mistakes," he added. "It can happen. After that he did a fantastic save."
Since Ancelotti replaced Marco Silva in December, only Liverpool have earned more points in the Premier League than Everton.
Everton travel to Arsenal in their next league match on Feb. 23.