Manchester City midfielder Fernandinho was off for shoving Chelsea counterpart Césc Fàbregas during a last minute incident at the Etihad Stadium and the Brazilian has been banned for three matches.
Chelsea won the game 3-1 to remain top with an eighth successive victory, but both clubs can anticipate FA disciplinary action for a failure to control their players.
Fàbregas's role in Fernandinho's dismissal could also be scrutinised after it appeared he struck the City player in the face, prompting the furious reaction.