They could have made history and sealed the earliest Premier League title by beating United on 7 April at Etihad Stadium, but let slip a 2-0 lead to lose 3-2.
Jose Mourinho has highlighted exactly how his Manchester United side must improve in order to win the Premier League title next season. Manchester United visit Bournemouth in the Premier League for a 19:45 kick-off on Wednesday before an FA Cup semi-final against Tottenham at Wembley on Saturday. Everything was slow. Everyone was one more touch, one more trick, one more flick, one more turn.
What would have been most disappointing for the Old Trafford outfit is the fact that it was them that handed their "noisy neighbours" the title instead of making them wait even longer for it.
City are 16 points clear of second-placed United, who can only take a maximum of 15 points from their remaining five games.
"In general open play we had a couple of chances", he said.
"Probably because I won eight championships I was not on the moon with the victory against them because that doesn't make me feel super-happy".
"You need consistency at every level". As I was saying: this is a very hard league and all the top-six teams, we knew in advance that two of them would be outside the Champions League positions.
Yet all that brilliance came after an opening 45 minutes that had been more typical of his club form this season; out of sorts, misplacing passes and lacking in verve. "When we play bad then, yes, tell the truth". The Baggies can acquire a maximum of 36 points with four games left in the campaign, but their fixture list is the toughest of the lot with matches against Liverpool, Tottenham Hotspur, Crystal Palace and Newcastle United - all of whom are in good vein of form.