Yaya Toure inspired Manchester City to a dominant victory at West Brom as £49m summer signing Raheem Sterling made his debut for the visitors.
A Toure shot appeared to take a slight deflection off David Silva before going through defender Craig Dawson’s legs and trickling over the line.
City extended their lead when Toure curled a shot into the top corner.
Vincent Kompany headed in a corner as City delivered an early statement of Premier League title intent.
West Brom had a rare chance for a consolation goal when Chris Brunt crossed for James Morrison, who headed straight at goalkeeper Joe Hart.
City host Chelsea on Sunday and the only negative for them was when Toure went off late on with an apparent groin injury.