Manchester 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.
Afterwards, Chelsea boss Frank Lampard said: "We made mistakes, individual mistakes, and didn't get close enough. They punished us.
"If you want to reach the top level which City have been for a few years now, you have to accept the pressures.
"The second half we competed but at 3-0 the game was pretty much done. I am not trying to talk up the last 20 minutes of the game because at 3-0 the vitals of the game have changed, but I was still looking for a reaction.
"I am not putting ourselves down. Today was painful in the first half in football terms because their level of play showed where we need to aspire to be. In the second half I saw a reaction, but the work needs to be done."
