Pep Guardiolas side moved an insurmountable 16 points clear of United with five matches remaining, thanks to Jay Rodriguezs header in the 72nd minute.
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Guardiola, who becomes the first Spanish manager to win the Premier League, has now won a remarkable 24 trophies in his nine-year management career.
Gabriel Jesus, Ilkay Gundogan and Raheem Sterling scored Citys goals as they returned to winning ways in London. Pep Guardiolas side have dominated almost everywhere theyve been this season, but they seem to have a particular fondness for the capital.
Video: Mauricio Pochettino after Spurs loss: Today was a difficult game – Daily Mail
He is the third Manchester City manager to claim the English title, after Roberto Mancini, in 2011-12, and Manuel Pellegrini, in 2013-14.
City now stand on the brink of a first Premier League title since 2014, and may be champions before they take to the field again. Defeat for Manchester United against West Brom on Sunday or at Bournemouth on Wednesday would end their faint hopes.
City have dominated this season, racking up 87 points after winning 28, drawing three and losing just two of their 33 fixtures so far.
They are eight points adrift of the Premier League record for points in a season, Chelseas 95 in 2004-05, and can become the first team to break the 100-point barrier, with a total of 102 possible from their remaining five matches.
Guardiola said he is proud to Manchester City manager and believes his players have been “awesome” this season en route to winning the title with five games to spare.
“Its incredible the way we played and I am so glad to be here and be part of this club,” he said after the 3-1 win over Spurs at Wembley.
“These guys are fantastic, awesome – they are incredible. This club is absolutely amazing in all terms.”
City put themselves in position to win the league by bouncing back from a bitterly disappointing week to ease past Tottenham Hotspur 3-1 at Wembley on Saturday to remind everyone why they have been the best side in the country by a distance this season.
Captain Vincent Kompany, in his 10th campaign with the Blues and now officially the most successful captain of all time, dedicated the crown to the City fans.
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“As much as this has been a record breaking season, this ones for you, the fans, this is why we do it!” said the skipper.
Video: Tottenham v. Man City I MATCH HIGHLIGHTS I 4/14/18 I Premier League I NBC Sports
Kompany, at home in Manchester, revealed many of his team-mates had flown off for mini-breaks to see family and friends after being given three days off.
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He said: “Theres players all over the world Portugal, Spain – you name it – wherever. We didnt expect this, weve been Facetiming, talking on the chat and everyone is in touch and as much as were far away from each other at this moment in time, we are still very close, and we will somehow spend the night celebrating together.
“Today is a sense of achievement because weve won the title in a way for the first time, Id like to have won all other titles, so Im extremely proud about this, and extremely aware of how fast these moments can go.”
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Manchester Citys title was wrapped up after the weekends Premier League results.
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Here, Press Association Sport reflects on Pep Guardiolas triumph and the rest of the weeks issues in the top flight.