Chelsea was hammered 4-0 at Bournemouth in its last away league match and Maurizio Sarri's side was taken apart by the defending champion at the Etihad Stadium, the Blues suffering their heaviest ever Premier League loss.

Raheem Sterling struck in the fourth minute and Ilkay Gundogan rapidly made it four after Aguero's first-half double, with Chelsea unable to muster any response in the face of City's incredible intensity.

Aguero, who also hit a treble in City's last home league game against Arsenal, stroked home a penalty after the break to join Alan Shearer on 11 Premier League hat-tricks and Sterling struck late to complete the scoring.

Pep Guardiola's side moved above Liverpool on goal difference, with the Catalan coach enjoying a crushing victory against a side he has lost to on a record three league occasions.

City made a blistering start and led 4-0 inside 25 minutes, with Aguero on target twice.

Sterling opened the scoring with a thumping drive after Bernardo Silva's cross deflected into his path, then Aguero somehow missed an open goal from three yards out.

Aguero soon made amends with a thunderous 25-yard drive after great work from Oleksandr Zinchenko and he then capitalised on Ross Barkley's abysmal header to become City's record league goalscorer.

City's fourth came from Gundogan, his placed 20-yard shot beating Kepa Arrizabalaga, with Ederson brilliantly tipping over Gonzalo Higuain's volley at the other end before the break.

Aguero's header from Kevin De Bruyne's cross crashed against the crossbar but the Argentina attacker was able to celebrate his historic treble in the 56th minute.

Sterling's pace and skill drew a clumsy Cesar Azpilicueta foul inside the box and Aguero beat Kepa once more with an excellent penalty.

Guardiola was able to rest City's hat-trick hero, De Bruyne and Fernandinho for the closing stages and Sterling tapped in a cross from the lively Zinchenko for a simple sixth.