Lee Williamson grabbed his first goal for the club as Watford maintained their 100% start to the season with a narrow victory over Sheffield United.
Williamson's deflected volley was enough to settle a dour encounter, and left United with just one point from their opening two league fixtures.
Darius Henderson should have scored earlier, but missed two easy chances.
Michael Tonge twice went close with drives as Bryan Robson's team pressed for an equaliser, but to no avail.
Watford boss Adrian Boothroyd:
"The most pleasing thing about the wins is that we have achieved them without playing to our full potential.
"There is still a lot of room for improvement, and we will not get carried away.
"I am going to be like (Reading boss) Steve Coppell, and not look at the league table."
Sheffield United manager Bryan Robson:
"I said in the dressing room at half-time that I wanted more urgency from my three forwards.
"But we did not improve at all after doing quite well in the first half, and we started slowly after the break.
"I was disappointed, because the frontmen let themselves down, and I expect more from them."
Watford: Poom, Doyley, DeMerit, Shittu, Stewart, McAnuff, Mahon, Williamson, Smith (Kabba 79), King, Henderson.
Subs Not Used: Lee, Hoskins, Mariappa, Priskin.
Goals: Williamson 56.
Sheff Utd: Kenny, Morgan, Kilgallon, Bromby, Armstrong, Stead (Geary 73), Montgomery, Tonge, Gillespie, Webber (Shelton 78), Beattie.
Subs Not Used: Bennett, Alan Quinn, Leigertwood.
Ref: Andre Marriner (W Midlands).
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