Sunderland intend to appeal against the red card shown to Sebastian Larsson in Sunday's defeat to Manchester United.
The Sweden international was dismissed just before half-time at the Stadium of Light for a challenge of United midfielder Ander Herrera.
Referee Craig Pawson produced a straight red but replays suggested only minimal contact and the Black Cats have decided to contest the decision.
David Moyes' side, who were 1-0 down at the time, went on to lose 3-0 and remain adrift at the bottom of the Premier League.
Speaking after the match, Moyes indicated both his frustration with the red card and the prospect of appeal.
''We'll have a look at it," he said.
"I don't want to make you think it's the referee's fault, it's not that. But he (Larsson) gets the ball, he touches the ball. There's no contact at all, so it's not even a booking. I didn't think it was a good decision.''
Sunderland striker Victor Anichebe had an even better view of the incident and drew the same conclusion, saying: "At the time, I was right there and I didn't think it was a sending-off. I think it was more Herrera's scream that made it a lot worse than it was."
Sunday's defeat was merely the latest disappointment in a season of them on Wearside. The club are now 10 points adrift of safety with just seven games remaining and their 10-year stay in the top flight in real jeopardy.