The Gunners overcame Liverpool in a Carabao Cup penalty shootout in midweek, but his regular first eleven lost 3-1 at Anfield in Premier League action on Monday.
The Spaniard is expected to recall his big guns for the visit of the Blades, with Hector Bellerin, Kieran Tierney and Pierre-Emerick Aubameyang coming back in.
Chris Wilder’s side are boosted by the return of John Egan from suspension, with the Irishman coming straight back into the side.
Captain Oliver Norwood came off the bench against Leeds last weekend, and the former Manchester United man is expected to start tomorrow.
It’s a 2pm kick off tomorrow at the Emirates Stadium.