Watford gave new manager Chris Wilder a perfect first night at Vicarage Road with a comfortable win over Birmingham City.
The Hornets scored twice in the first half through Imran Louza and Keinan Davis before Britt Assombalonga added a third after the interval.
The win, only Watford's second in their past 10 games, moved them up to 10th in the Championship table, four points off the play-offs.
Birmingham's defeat was their fifth in their past seven games and leaves them 18th, seven points above the relegation places.
Although they arrived on the back of a win against Rotherham, Blues' lack of forward power was obvious, with club captain Troy Deeney watching from the sidelines with an Achilles injury as his team-mates struggled against his former club.