Chelsea head coach Enzo Maresca said Liam Delap's red card against Wolves was "very stupid" and "embarrassing".
Delap made his return from a hamstring injury as a second-half substitute in the Carabao Cup fourth-round tie at Molineux, but was sent off just 25 minutes after coming on after being shown a second yellow card.
The striker, making his first appearance since August 30, was booked in the 79th minute for pushing over Yerson Mosquera in an off-the-ball incident and then just seven minutes later, he jumped into Emmanuel Agbadou with his elbow.
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Highlights of the fourth-round Carabao Cup match between Wolves and Chelsea
It was Chelsea's fifth red card of the season and Maresca said: "Very stupid red card that was completely unnecessary.
"Absolutely deserved. It was a stupid foul. We can avoid that. I completely support the red card."
In particular, the Chelsea boss was frustrated because he had warned the player, who will now miss Saturday's Premier League game at Tottenham Hotspur, _live on Sky Sports._
He said: "After the yellow card, I told him four or five times, keep calm. But Liam is a player inside the pitch, playing the game for himself and he struggles to listen to things around him."
Asked if Chelsea's disciplinary record was embarrassing, Maresca added: "It is embarrassing when it is a red card like today. It is embarrassing two cards in seven minutes, both we can avoid."
_More to follow..._