Despite creating a host of chances on the night, it was to captain for the night Scott McTominay’s early goal proved the key difference between the teams.
The hosts were on top from the start in this one as Dan James’s drive tested Daniel Bachmann before McTominay bulleted home Alex Telles’ corner.
That early goal opened the game at both ends with Hornets defender Adam Masina denied by David De Gea before Eric Bailly skidded a header just wide.
United continued to dominate things after the break with Bachmann called into action to deny Juan Mata and Mason Greenwood.
United talisman Marcus Rashford did almost make the game safe in the final minutes but Bachmann was there once again to keep the score down.
Full Time from Old Trafford it’s Manchester United 1 Watford 0