Jay Rodriguez's goal at Old Trafford meant that City finally got their hands on the crown, leading their rivals by 16 points with five games to play.
United manager Jose Mourinho asked for consistency from the France global this week following his two-goal performance in last weekend's win over Manchester City.
Vincent Kompany barely let Manchester City's Premier League title celebrations begin before setting his side the challenge of making it two in a row next season.
"Premier League Champions 17/18", City tweeted soon after the final whistle, when the fifth English top-flight title of its history was assured.
Jose Mourinho accused his players of being "on the moon" after losing to the Premier League's bottom side West Brom. But having surrendered leads to United and Liverpool in the previous seven days, the visitors could have stumbled once more when Christian Eriksen brought Spurs back into the game before the break. Everything was slow, everything was one more touch, one more flick, one more trick, one more turn, ball lost and no continuity or fluidity in our football.More news: Injured Kamlesh Nagarkoti ruled out of IPL season
There have been rumours swirling the past few weeks that Pogba's causing problems at Old Trafford, with United staff being "unimpressed" with his attitude and commitment on the training track. 'We were deservedly punished, ' he said.
"I saw lots of people on the moon because we won against City".
United's performance was in stark contrast to their display against City last time out, and Mourinho's team selection is also likely to come under scrutiny.
"I trust in my work. City won the title because they won more points than us, you are not going to say that they won because we gave them the title. that's not fair to them", Mourinho said. Here are some of the most impressive stats from their title win.
United should have had a first-half penalty after Craig Dawson caught Ander Herrera, but complacency seeped in and West Brom showed fight under caretaker boss Darren Moore that has been sorely lacking this season. You have to be consistent at every level, not just the performance level.
"We are a team that has beaten every other team in the Premier League - beaten every one of the top six".