The Rossoneri coach has revived the debate of the Ghanaian's ghost strike versus the Bianconeri as he strongly feels the contentious decision will cost his side in the end
The Ghana international beat Juve goalkeeper Gianluigi Buffon with a header from close range, but the match officials failed to spot that the ball had crossed the line and waved play on.
Allegri has not forgotten about the incident, though, and has pointed out that both sides could be level on points now with four rounds remaining had Muntari's goal been given.
"I believe that the referees have been doing very well this season. There is only one incident that has really affected the title race and that's Muntari's goal," Allegri was quoted as saying by La Gazzetta dello Sport.
"If Juventus win the title by three points, as it stands now, that single incident will have been decisive."
Milan are currently preparing for the Serie A match away against Siena on Sunday.