But, the loss to West Brom meant City were crowned champions and Mourinho reveals how he predicted his side would suffer defeat before the game even kicked off.
This may have been the first time United have been beaten at Old Trafford by a side other than City during Jose Mourinho's two-year reign but their lifeless performance was nothing new.
"I don't know if I was the first or second or third but I congratulate them face to face when I had the chance", Mourinho said.
"Congratulations to Manchester City on their Premier League title win", they wrote on their official Twitter account.
"City were the best team, sooner or later they would get the points, so no dramas when the best team wins the league", he said.
"I saw lots of people in the moon because we won against City".
"I'm buzzing, over the moon, so happy".
For all of United's class recently and across season in general, it was a calamity of errors and an unwanted punchline to their campaign.
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A 16-point lead with five games to play and 93 goals scored represents an emphatic response, not that any doubts ever existed inside the City dressing room.
"Eight titles are eight titles and three Premier Leagues are three Premier Leagues". I have been lucky to win three but so many I have missed as well.
Do you think Man Utd will close the gap to Man City next season?
"Everything must be consistent until the last day".
"This is not a dynasty, it is one title we've won".
The second half was not much better but Foster did wonderfully well after 66 minutes to tip a Lukaku effort around the post before the visitors resistance was then unexpectedly rewarded with 17 minutes remaining.
Chris Brunt sent in a testing corner from the left and when Nemanja Matic failed to clear, Jay Rodriguez diverted home.
An anonymous showing against West Brom, though, seems to have returned him to square one.