Manchester City thrashed relegation-threatened Sunderland but home substitute Vincent Kompany limped off soon after his return from injury.
Raheem Sterling opened the scoring by heading in Kevin de Bruyne's cross.
The lead was doubled through Yaya Toure's low 20-yard drive before Wilfried Bony headed in another de Bruyne delivery.
The brilliant Belgian calmly scored before Fabio Borini's consolation, as Bony skied a penalty later on.
City will be concerned by the second-half departure of skipper Kompany, just minutes after coming on, having missed the previous eight matches with a calf injury.
The defeat leaves Sunderland still five points adrift of Premier League safety, while City remain in third place.