Two goals from Manni Norkett, Marc Jurado's opener and a strike from Alejandro Guarnacho proved to be enough to overcome the Potters but it is hard to imagine United having to work as hard this season to win three points.
Leaden skies dominated the scene at Carrington as United started the game in a positive and lively mood.
And it was only resolute defending from the Potters and poor finishing when United’s forwards were in good scoring positions that kept the scoresheet blank.
Sam Mather made a terrific run down the left wing and he looked odds-on to open the scoring but his shot wasn’t up to scratch.