Sir Alex Ferguson has launched an amazing attack on Manchester City and warned them he has "plenty of ammunition" if they want to engage in mind games.
Earlier this week, former Blues midfielder Patrick Vieira said the decision to bring Paul Scholes out of retirement smacked of desperation.
However, United have won nine Premier League games and drawn one with Scholes in the team, suggesting the move has worked.
It certainly has provided Ferguson with the opportunity to hit back in a week when Carlos Tevez has made his controversial return to the Manchester City fold.
"If it's desperation bringing the best midfielder in Britain back for the last 20 years then I think we can accept that," said Ferguson.
"I think he (Vieira) was programmed for that. Roberto (Mancini) had a wee dig a couple of weeks back. We're all going to play our hand that way. There will be plenty of ammunition for that.
"If you talk about desperation, they played a player the other night who refused to go on ...