Chelsea: So is this Chelsea more like the team we saw lose 4-0 to Bournemouth, the one that beat Huddersfield 5-0 or somewhere in between?
Raheem Sterling opened the scoring after four minutes and City should have been further ahead four minutes later when Aguero somehow contrived to fire wide of an open net from five yards out.
Both Manchester City and Chelsea went into their clash on Sunday afternoon needing three points.
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Aguero should have doubled the lead nearly immediately but remarkably missed from close range. The striker played a one-two with Oleksandr Zinchenko outside the area and then unleashed a ferocious shot that flew in from 25 yards.
The Brazil global has been an integral part of the Citizens' side for five and a half seasons, and has helped the side win two Premier League titles during his time at the club.
Guardiola pointed to Aguero's 40th-minute opener in last month's 2-1 win over fellow title challengers Liverpool as the ideal example to illustrate his point.
Aguero's second was gifted to him.
There seemed to be no let-up from City with De Bruyne firing a free kick at Arrizabalaga and Aguero shooting into the side-netting. He did not have to wait much longer, however, as Sterling was felled in the box by Cesar Azpilicueta.
Aguero completed his hat-trick with a penalty 11 minutes into the second half after Sterling had been fouled by Cesar Azpilicueta.