Three local friendlies against EFL teams have been confirmed as United continue to build up to the 2018/19 Sky Bet Championship season.
United have already announced that the pre-season campaign will kick off at Stocksbridge Park Steel on Saturday 7th July.
The Blades will also visit Bradford City, Mansfield Town and Doncaster Rovers in July.
The trip to Northern Commercials Stadium to face Bradford City will be on Tuesday 17th July, with a 7.30pm kick-off.
This will be followed by a visit to the One Call Stadium to face David Flitcroft's Mansfield Town on Saturday 21st July, kicking off at 3pm.
Then a short trip to the Keepmoat Stadium is planned on Friday 27th July (7.45pm kick-off) to face Darren Ferguson's Doncaster Rovers.
In addition, a pre-season training camp and a friendly in Europe are being organised, whilst it is hoped a home friendly will also be arranged. Once details have been finalised, sufc.co.uk will have all the information.
The Sky Bet Championship season will kick-off on Saturday 4th August.