Marouane Fellaini saw red for headbutting Sergio Aguero as Manchester City retained a slim advantage in their top-four battle with Manchester United following a frantic goalless draw at the Etihad Stadium.
Fellaini's moment of madness - a clear butt on Aguero as the pair clashed following a trip by the Belgian - came six minutes from time in a tense stalemate that leaves City a point in front of their neighbours and in charge of the Champions League race.
Fellaini had been booked moments before for a trip on the City striker and was in wide-eyed and animated mood as he eventually left the pitch, a stunning denouement to a match the home side dominated without getting on the scoresheet.