Manchester City demonstrated their Premier League title credentials with a dominant 1-0 victory at champions Chelsea.
Kevin De Bruyne scored the only goal as Pep Guardiola's men suffocated Chelsea with their intensity to move six points clear of the holders after seven games.
Chelsea lost striker Alvaro Morata to an apparent hamstring problem in the first half and were second best to a City side denied when Thibaut Courtois saved from David Silva and then Fernandinho.
De Bruyne's left-footed strike from the edge of the area proved decisive against his former club, to give City a sixth win from seven games and inflict Chelsea's second loss of the season.