Coventry manager Chris Coleman jumped to the defence of teenager Jordan Clarke after he was sent off in Friday's 2-1 defeat to Derby.
The defender received a second yellow card for bringing down Robbie Savage. He had been booked in the first half for mis-timing a challenge on Dean Moxey.
However, despite the red card, City boss Chris Coleman was impressed by Clarke and felt the 17-year-old's dismissal was harsh.
"Jordan Clarke had a very good game," said the Welshman. "He's only a baby out of the academy. He's inexperienced but he coped very well I thought.
"As for the red card. Both players went in. Jordan is already on a yellow card but he's a full-blooded player and a tough defender - he's not a dirty player - and he was never going to pull out of that challenge.
"I'm not going to say I will need to see it again, but what I will say is that we had one referee in the first half and another in the second half."