City began 2018 in impressive fashion as they swept Watford aside 3-1 at a rain-drenched Etihad.
Sergio Aguero then added to the tally midway through the second half before Andre Gray's late, late consolation strike for the Hornets.
It was a welcome return to winning ways for Pep Guardiola's side following the 0-0 draw at Crystal Palace on New Year's Eve.
And the result moved the Blues 15 points clear at the top of the Premier League with the focus now switching to the FA Cup and Carabao Cup over the next seven days.
Watch the extended highlights in our video above.