Manchester City boss Pep Guardiola set an unwanted personal record in Sunday's derby defeat by Manchester United.
His City side have now lost seven games in the league this campaign, more than the former Barcelona and Bayern Munich coach has ever lost in a season before.
United midfielder Bruno Fernandes, who set up the opening goal for Anthony Martial, put his fingers to his lips after arguing with Guardiola moments before Scott McTominay sealed victory in injury time.
The win means United have done the league double over their rivals.