Chelsea inflicted a first Premier League defeat of the season on champions Manchester City to breathe life into their own title challenge.
City had spurned a host of chances when NāGolo Kante slotted Eden Hazardās cutback high into Edersonās net to put the home side in front.
As the visitors became increasingly frantic in the second half, David Luiz rose highest to glance Hazardās corner inside the far post.
Pep Guardiolaās side, beaten in the league for the first time since April, slip to second, a point behind Liverpool.
Chelsea are a further seven points back, jostling for third place with Arsenal and Tottenham.
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