Manchester City earned their first Premier League home win in almost three months as they edged past Watford at Etihad Stadium.
The Blues, looking to avoid a third top-flight defeat in a row, led when an unmarked Zabaleta calmly side-footed in Kevin de Bruyne's deep cross.
Raheem Sterling clipped the Watford bar after the break, before Odion Ighalo poked over Watford's best chance.
And the visitors were punished when David Silva tucked in a late second on his 200th league appearance.
More to follow.
Chelsea moved six points clear at the top of the Premier League as Cesc Fabregas' first-half goal beat a stubborn Sunderland at the Stadium of Light.