Manchester City were held to a goalless draw against Crystal Palace at the weekend.
But Pep Guardiola’s men returned to winning ways by easing past Watford on home soil.
Raheem Sterling opened the scoring after just 38 seconds, calmly slotting in after good work from Leroy Sane.
Manchester City doubled their lead through an own goal by Christian Kabasele.
Kabasele bundled the ball over his own line after Kevin De Bruyne’s cross caused panic in the Watford area.
City made sure of the win after the interval.
Sergio Aguero is being linked with a move to Real Madrid in the January transfer window.
But the Argentine got on the scoresheet to make it a comfortable afternoon for the home side.
The only bad note was their failure to keep a clean sheet.
Andre Gray scored in the 82nd minute but his strike was only to be mere consolation.