It's a Tuesday double header for United!
Chris Wilder will take the first-team, fresh from Friday's 1-0 victory over Malaga in Coin, to the Proact Stadium to face Gary Caldwell's Chesterfield, kick-off 7.30pm.
The fixture in Derbyshire is all ticket for Blades fans, but Chesterfield have advised that a limited amount of tickets will be available to purchase on the evening of the game from the North Stand Kiosk.
Wilder's men have won both games to date and are yet to concede a goal, scoring ten times in the process.
Meanwhile, the U23s, who have already beaten Sheffield FC and Scarborough Athletic in pre-season, will face Worksop Town at Sandy Lane, kick-off 7.15pm.
Admission, which is pay on the gate, is £5 adults with U10s free with a paying adult