Arsene Wenger could face charges from the FA after he angrily confronted referee Neil Swarbrick following Arsenal's 2-1 defeat at Watford.
According to the Evening Standard, the French boss chased the official down the tunnel at Vicarage Road and even entered the referee's room where the two could be heard arguing.
Wenger made his feelings towards the officiating during the game clear in his post-match press conference as he called the decision to award the hosts a second-half penalty 'scandalous'.
Indeed, Richarlison, who won the penalty after going down under pressure from defender Hector Bellerin, is also under investigation from the FA and could face action if he is deemed to have dived.