Nottingham Forest winger Garath McCleary will serve a three-match ban after the appeal against his sending off at Peterborough was rejected.
He will miss the matches against Blackpool, Reading and Hull and return for the final game against Portsmouth.
McCleary said on Twitter: "[It is] disappointing news. I face those tackles every week but nothing I can do now. Thanks for the support."
Manager Steve Cotterill had expected the decision to be overturned.
"I would be amazed if it's not rescinded," he told BBC Radio Nottingham, after his side's 1-0 win at London Road.
McCleary was shown a straight red by referee Carl Boyeson for a challenge on Grant McCann.
The dismissal came with 20 minutes left in the game and Forest's 10 men held out for the win.
Cotterill had praised the referee for promising to look at the decision.
"Give the referee credit, he's pulled me to one side and said he's going to look at it," he added. "That doesn't happen a lot with referees.
"They normally just shut their doors and don't want to see you until 30 minutes after the game, when you're already back on the bus.
"So credit to him. Hopefully people will see that there are good referees and that appeals can be successful."