Alex Ferguson has responded to a recent barrage of criticism from Patrick Vieira by saying that the former Arsenal star should be charged by the FA.
Vieira, employed at Manchester City as their football development executive, said recently that Manchester United receive an unfair advantage from referees when playing at Old Trafford.
"He's more or less saying all the refs have been wrong this season and you're not supposed to discuss referees," Ferguson said.
"He is a paid official isn't he?"
"When you go through the statistics since I have been here, it only averages out at three a year. You cannot say that is a lot for an attacking team like ourselves."
United currently enjoy a three-point lead over City at the top of the Premier League table.
