Javier Acuna gave Watford the lead in their League Cup tie against Norwich City with the hosts' first shot on goal, as they look to take a Premier Legaue scalp.
Norwich started brightly with former Birmingham City winger Nathan Redmond posing an attacking threat and forcing a save out of Jonathan Bond early on.
The Canaraies continued to look comfortable as they enjoyed the greater possession with Watford continuing to give the ball away.
However, the Hornets took the lead with their first shot at goal on 24 minutes when Javier Acuna's powerful drive beat keeper Mark Bunn.
After going in front Watford appeared to settle into the game but their progress was subdued after Josh McEachran, who was making his first start since joining on loan from Chelsea.
Norwich almost equalised in the dying minutes of the half as Bond was called into action to tip over Wes Hoolahan's well-struck shot.
For the ensuing corner, American international Bradley Johnson hammered his header against the home side's crossbar.
Norwich will be looking to bounce back from their 2-0 defeat at the hands of Tottenham on Saturday.