Manchester United have put in a claim for wrongful dismissal to the Football Association following Cristiano Ronaldo's red card in the Manchester derby.
The Portuguese winger was sent off on Saturday for a lunge at City striker Andy Cole when United were trailing 2-0.
Referee Steve Bennett showed him a straight red card and United went on to lose 3-1 at Eastlands.
The FA will hear the appeal at an FA disciplinary commission on Tuesday.
Ronaldo's challenge came seconds after he was the victim of a late tackle by City full-back Stephen Jordan which went unpunished.
United boss Sir Alex Ferguson had a furious altercation with Bennett at half-time making it clear he was unhappy with several decisions the Kent official had made.
Ferguson was particularly annoyed by another Jordan tackle, this time on Wayne Rooney, which saw the City man rake his studs down the striker's shin but escape punishment.