United's players impressed new boss David Weir in the first game of the Scottish tour on Wednesday evening.
Chris Porter's second half penalty gave the Blades a 1-0 success over Greenock Morton in a fixture Weir used to view 22 players. Michael Doyle skippered the first half team with Neill Collins taking over the armband in the second period.
"The boys worked hard and that was the priority for us, said Weir. "There are no complaints from me.
"The application was right from the lads and that's difficult when you know you are only getting 45 minutes. We passed the ball well and although it was a little slower in the second half, that was always going to be the case with a few trialists joining us."
Three trialists have joined United on tour.
Danny Grainger, who has been released by Hearts, played at left-back, whilst Steven Saunders, who is out of contract at Motherwell, operated at right-back. New Caledonian international Roy Kayara played further forward and created a chance for Porter with a chip over the Greenock Morton defence.
The Blades will now train north of the border ahead of fixtures against two more Scottish First Division sides, Cowdenbeath on Saturday and Raith Rovers next Wednesday.