Ferguson accused Roberto Mancini of attempting to influence officials after the two had a bit of a touchline bust up.
The two managers had to be kept apart as they exchanged heated words and waved their fingers at each other quite angrily.
Ferguson had jumped up from the dug-out to let his feelings be known about the disgusting challenge on Danny Welbeck by Nigel De Jong.
Later the United boss accused Mancini of harassing the officials.
"Mancini was badgering the ref and the fourth official all game,"Ferguson told the BBC.
"He was complaining about refs all week but he can't complain about this one."