Sir Alex Ferguson is waiting to discover if he faces action for a touchline rant at the match officials on Boxing Day.
The Manchester United manager publicly laid into referee Mike Dean, fourth official Neil Swarbrick and linesman Jake Collin moments before the second half of his side's victory over Newcastle.
Ferguson was furious after Jonny Evans' own goal in a 4-3 United win was disallowed for offside against Papiss Cisse only for Dean to award the goal following a consultation with Collin.
And, although Ferguson was not sent to the stands, the referee could yet mention the incident in his report to the Football Association.
Speaking after the game, the United boss said: "The referee changed the linesman's mind.
"He said it was an own goal. But if you see it again, and the referee can't the guy is in an offside position, then he pulls Evans' arm. If that is not interfering what is? I think it was a bad decision."