However, while football writers up and down the country scrambled to push something out about City winning the title in their rivals' shock loss to the Baggies, the Citizens had their own celebration prepped.
United had to at least draw to keep the title race mathematically alive but were stunned at Old Trafford when Jay Rodriguez headed home after the break.
Manchester City captain Vincent Kompany on Sky Sports: We were consistent the whole season and were able to play at the level we were expected to perform at. "So happy to be able to share another trophy with our fantastic fans!"
A week after City surrendered a 2-0 lead to lose 3-2 to United and squander the chance to wrap up the title in ideal style against their arch-rivals, it was relegation-bound West Brom who served it up on a plate.
Manchester City won the league with 5 games still left to be played and became only the third team in English league history after Manchester United (1907-08 and 2000-01) and Everton (1984-85) to achieve the feat in 33 games.
City were surprisingly crowned champions after Jose Mourinho's side were embarrassed in a 1-0 home defeat to rock-bottom West Brom on Sunday. I think with my experience you don't win titles with inconsistency. They started to do it with such an emphatic win over Spurs, but can now take it further by eroding so many records.
"I've seen many teams win it where they've been champions all season and it's a first for me". We deserve to be punished.
Given the way they have demolished all challengers in the league, it was apparent months ago that it was only a matter of when rather than if City would take the title.
City are 16 points clear of second placed United, who can only take a maximum of 15 points from their remaining matches. City scored more goals, shared among more players, had more shots and even hit the woodwork more times than anyone else. And in the space of a minute and a half, Man City go from the most revered side in the league, to the pile of absolute crap that they were before the club was squirted with oily goodness.
Henceforth, City would eye surpassing Chelsea's record 95 points accumulated in a single season. Guardiola had planned a day of golf with his son Marius on Sunday, so the Spaniard might have learned of his first Premier League while on the course.
Speaking after Saturday's 3-1 win over Tottenham, the 47-year-old gave all the credit to his players. He also conceded it was sweet to triumph in a country where some critics claimed his purist principles couldn't flourish. The people can believe Manchester City is a good team and a good club. "Then the first time you lose one, you think you're never going to win another ever again".