In a video shared on Twitter, the man can be heard shouting; "We've done the domestic f****** treble. No-one's ever done it before but you'll all have Mo Salah on the back of the f****** paper tomorrow. City!" before being ushered away.
Watch below (warning: contains industrial language):
Language content: Man City fan gets into press box and complains about media covering Salah pic.twitter.com/mz2mm8J27n— Rob Harris (@RobHarris) May 18, 2019