However, the Red Devils handed the title to City in tame fashion eight days later after Jay Rodriguez clinched a rare victory for the rock-bottom Baggies with his 73rd-minute header. "Don't say City won the title because United did not win, it is not fair on them", he said.
As City wrapped up the Premier League without having to kick a ball, here are five things we learned.
Guardiola and his team had hoped, of course, to win a third championship in seven years in rather more satisfying circumstances: had Guardiola and City beaten Manchester United at the Etihad Stadium last Saturday, they would have claimed the title on home soil, against their fiercest rival.
"Then the first time you lose one, you think you're never going to win another ever again", he told Sky Sports.
In situations such as these - with United being second in the table - Ferguson may have trusted his players to play with more freedom and blow West Brom away, which begs the question of whether Mourinho has the same faith in his squad to deliver.
Mourinho greeted West Brom caretaker manager Darren Moore with a warm hug after the two teams had made their way onto the pitch. "Everything was slow or one more touch, one more flick, one more turn, and ball lost".
While letting West Brom have a feel for the game, United will have felt in control but when it came to pushing forward and punishing their opponents the home side faltered.
City boss, Pep Guardiola had doused high expectations over the fixture's outcome when he said he would rather be playing golf than bother about the game.
David De Gea - 4/10, 10/10 He was at fault for the second City goal to begin with. It's important we continue to fight and work hard for each other. "I am pleased we managed to show everyone that".
"I saw lots of people in the moon because we won against City".
Paul Pogba, the two goal hero last week, was substituted in the 58th minute after a poor display in which he also picked up a yellow card.
The Baggies official Twitter account tweeted a graphic on the full time whistle showing the score accompanied by a photograph of Jay Rodriguez celebrating his goal.
And though Foster won't be at the World Cup in June, he could yet be in the Premier League with a new club next season.