The Manchester United boss has had his Old Trafford dugout fitted with central heating and carpeted in the club's red and black colours. The away team's dugout, however, remains a little more Spartan.
Chelsea boss Claudio Ranieri seemed to feel the chill, making a string of negative substitutions while Sir Alex sent on Uruguayan hotshot Diego Forlan who scored the winner in injury time.
Sir Alex is famed for playing mind-games against his opponents - but today a club spokesman tried to play down the significance of the renovation.
"It wasn't gamesmanship," said United spokesman Paddy Harverson.
He insisted the away dugout would get the same treatment "as soon as possible" and added: "We just didn't get around to doing the away dugout before the Chelsea game. We haven't yet been able to do it."
An Old Trafford insider said: "Did you expect the away dugout to be done first? I don't think so.
"The away teams are very well looked after here, but at the end of the day everyone wants a win and every little advantage helps."