Meanwhile, Arsenal crashed to a fifth consecutive away defeat in the Premier League as Matt Ritchie fired Newcastle to a 2-1 win at St James' Park on Sunday.
Nonetheless, Guardiola hopes City will handle the pressure.
They had scored 16 goals in their previous three league games but needed only one to move to the top of the table at Stamford Bridge. What's the big deal? "I would say so", former England captain Alan Shearer said.
I've never been able to retain the title so I want to see if this team has got it in them to carry on and be even more successful.
But do not lapse into false equivalence and claim this undermines Guardiola the coaching visionary, Guardiola the razor-sharp tactician and Guardiola the obsessive victor.
Having swept to the title in dazzling style, here AFP Sport looks back at five matches that played a key role in City's success this season:.
For all the money spent subsequently, Guardiola coaxed a breathtaking team from the nucleus he inherited.
City provided a live stream of the Belgian's reaction at the full-time whistle, with Kompany facetiming his colleagues Kevin De Bruyne and Kyle Walker and keeping his fingers busy in the squad Whatsapp chat. "Our City. Premier League Champions 17/18".
Manchester United manager Jose Mourinhosaid: I think we were deservedly punished.
The aging full-backs and supporting cast were not fit for objective, but De Bruyne and Silva plugged away alongside one another to forge an unbreakable understanding.
The players and the staff put a real shift in and there is real belief at the club. It's much more important what these players have done. Money had proved no guarantee.
Claudio Bravo's series of costly errors in goal saw him replaced by the excellent Ederson to give City a far more stable platform from which to build.
Mourinho and United still has a chance of wining a trophy this season - the FA Cup - and on Saturday face Spurs at Wembley stadium in the semifinals of the tournament. Last not 20 years ago, it was three. How about one who can use his hands!
Critics point to the enormous sums City have splashed on players before and during Guardiola's reign, with almost £500 million ($700 million) spent on transfer fees in the past two seasons alone.
The Premier League bottom side held on to the lead as the match ended 1-0 to the side from the Hawthorns. He used to play like that most weeks.
"They don't understand absolutely anything about football".