They saved the best for last, with substitutes Teddy Sheringham and Ole Gunnar Solskjaer scoring in stoppage time to stun Bayern Munich in the Champions League final in Barcelona.
Mourinho also believed that some of his players were guilty of complacency after their stirring comeback in the Manchester derby the previous weekend.
Quickly after United" s defeat on Sunday, the Metropolis web site tweeted: "Our Time.
The loss, coupled with City's victory over Spurs on Saturday, gave Pep Guardiola's team an insurmountable 16-point lead with five matches to play as Manchester City clinched their third Premier League title in seven years. Our Time. Our City. City's other two Premier League triumphs, in 2012 and '14, were sealed on the final day.
After their heroics at the Etihad, United suffered the ignominy of being defeated 1-0 at Old Trafford byWest Brom, thanks to a second-half header from Jay Rodriguez. Vincent Kompany did, with images showing the City captain celebrating at his in-laws' house where he was having dinner.
"I'm not trying to explain anything here, or to make an excuse, I just want to keep this weekly meeting with you, although in days like this one it's complicated".
Chelsea claim first win from 2-0 down since 2002
Conte swiftly responded by hauling off the disappointing Alvaro Morata and Davide Zappacosta for Pedro Rodriguez and Giroud. First, Giroud expertly met a cross from Marcos Alonso , who was lucky to be on the pitch after stamping on Shane Long .
Their dominance of the title race has been so emphatic and convincing that every one of their so-called rivals has been beaten by City at least once, and none of them has been able to prevent Pep Guardiola's team from winning the title with a month to spare.
"I trust in my work, that is for sure", added Mourinho. But I would argue that we can go further back than that: October 14, 2017.
An 18-match winning run from late August to late December laid the platform for the runaway title victory, and it was only a matter of when it would be clinched.
Mourinho claimed he could tell in training his players had taken their eye off the ball after the City game, saying: 'I know them, I smell, I've lots of experience and that's not me because I won eight titles and I'm not on the moon because I won against City.
Although this performance was particularly bad, many Red Devils fans will point out that this type of turgid display has been commonplace this season.
However, when questioned on how City compare to his Chelsea team which won the league a couple of years ago, Mourinho was reluctant to comment.
"When someone is champions they deserve people to say that and I'm not going to come with excuses, like I didn't after we beat them", he said.