Man City produced a ruthless attacking display to cruise past Chelsea at Stamford Bridge and increase the pressure on manager Frank Lampard.
The visitors, who were without a number of first-team players following an outbreak of coronavirus at the club, stunned Chelsea with three goals in 16 first-half minutes.
Ilkay Gundogan’s crisp low finish broke the deadlock and Phil Foden doubled City’s lead three minutes later, tucking a superb first-time strike beyond Edouard Mendy after fine work from Kevin de Bruyne.
De Bruyne deservedly got his name on the scoresheet with a close-range finish after Raheem Sterling’s curling strike had rebounded off the woodwork.
Callum Hudson-Odoi scored in second-half stoppage time for Chelsea, firing Kai Havertz’s cross beyond Premier League debutant Zack Steffen.
The result lifted City up to fifth in the table, four points off Liverpool and Manchester United with a game in hand on both.
Chelsea, who would have gone top had they beaten Everton on 12 December, drop to eighth.