In the meantime, the world had to make do with Everton, although not the same kind of Everton that upset the applecart at Old Trafford last season.
It was asking too much for this game to be as thrilling as the 4-4 draw in April last season, when United twice squandered a two-goal lead and eventually had to acknowledge that it was the day when the title started to slide away from them.
Even so, taking a 12-point lead in the title race was never supposed to be as easy as this.
Sitting in the directors' box, wrapped up against the cold and trying not to catch the eye of the hordes gawping at him, Mourinho watched a United side comfortably contain an Everton team that had none of the attacking menace of 10 months ago.
Is that it for the title, then? Yes, according to Kevin Keegan, who was the Newcastle United manager when they blew a 12-point lead over Manchester United in 1996 – he said it would be over if United won yesterday.
So, too, the usual publicity-seeking bookies, who are paying out on United already.
Having promised last Friday to play "two different teams" in yesterday's game and then against Real Madrid on Wednesday, Ferguson claimed after the match that he had scrapped that plan following City's defeat.
He said: "I was going to make seven changes. Then, when I got the City result, I thought this would be a more important game for us.
Ferguson still made four changes and detailed Phil Jones to do an old school man-to-man marking job on Marouane Fellaini, prompting speculation that the United manager was planning a similar strategy in an effort to shackle Ronaldo on Wednesday.
Jones, however, limped off before the end and he is a doubt for Madrid.
There was the usual bonhomie about Mourinho, who had gone to see Ferguson before the game and was allowed to enter the stadium through the players' entrance rather than have to brave the punters and come in through the directors' entrance in the South Stand.
Mourinho granted his only interview of the day to MUTV. You could see a beautiful relationship blossoming.
As well as all the usual stuff about the prospect of Wednesday's game, Ferguson said simply that he hoped United would be able "to get the team we want out on the pitch".
There are concerns over Jones, and Jonny Evans came off with a touch of cramp, but otherwise, whatever can he mean? He has all his big guns ready to go.
Until Robin van Persie scored United's second goal, in time added on at the end of the first half, Everton's threat remained.
They beat United 1-0 at Goodison Park on the first day of the season and, even having lost Sylvain Distin, who was unwell, half an hour before kick-off, there is enough experience in this Everton side not to be intimidated by United. The problem is, there was simply not the goal threat.
David Moyes' team have won just one of their last five league games and the manager admitted yesterday that the fatigue may well be setting in as the likes of Baines, Steven Pienaar and Leon Osman rack up the games without any scope to rest them. "Maybe it only allows us to have one half of the season," he said. "I hope I'm wrong."
For the first goal, it was Baines who lost a crucial header to Antonio Valencia in the build-up. Johnny Heitinga failed to get close enough to Van Persie, allowing the striker to get away from in the box and cut the ball back to Ryan Giggs, who had enough time to pick his spot, in off the inside of Tim Howard's left post.
It is the 23rd consecutive season in which Giggs (39) has scored in the top- flight of English football.
Ferguson said: "I think all the superlatives have been used and he doesn't need any because his legacy lives on.
"Ryan is just a fantastic human being. In this game again, at 38 years of age, or is he 39? Maybe 40! I don't know, but he's up and down that pitch all day and showing fantastic energy for the game. It's wonderful to see."
Giggs' goal came after 13 minutes, and Everton's best moments were in the latter part of the first half when De Gea saved well from Osman and Rafael Da Silva, United's best player, got the ball away from Victor Anichebe in the nick of time.
From much the same position, Van Persie had hit the woodwork on ten minutes but once again he gave United that extra dimension of quality at a critical point of the game.
After the break, Everton did not look nearly so much of a threat with the away fans finally getting their wish with Nikica Jelavic's introduction.
United went closer on 66 minutes when Howard saved three times from close-range in the penalty area and then from Tom Cleverley's shot.
Moyes said afterwards that at the beginning of the season he would happily have taken three points from the two fixtures with United and it was hard to argue with him.
As for United, they leave Manchester tomorrow with a huge European game in prospect and their neighbours, and title rivals, approaching meltdown. Which is just the way United like it.
Ferguson had warned in his programme notes that if his players were to throw away a lead as they did in the corresponding fixture last season when Everton scored two late goals to snatch a 4-4 draw, they would "feel the full effect of the hairdryer".
He said after the game: "I thought they (Everton) dominated in the first half for 20 minutes in terms of possession and had a couple of near things – they were always a threat from corners and have great delivery from Baines.
"We saw that through and played much better in the second half without scoring the goals. We were really in control.
"They must remember what we call a bad experience (last season's 4-4 draw) and that was one last year. So when it came to that last 15 minutes they showed a really steely determination to make sure nothing happened silly."
On the title race, Ferguson said: "Look at the next game and win the next game. That is the only thing we can do, then win the next game. That is all we should think about." (© Independent News Service)