Luke Shaw, Chris Smalling and Phil Jones all seemed to be called into doubt by the manager after the Red Devils drew with Swansea City on Sunday
Jose Mourinho refused to blame his "exhausted" Manchester United players for conceding a late equaliser to Swansea City but again appeared to question the commitment of Chris Smalling, Phil Jones and Luke Shaw.
Wayne Rooney's first-half penalty had looked set to secure a win for the home side that would have lifted them into the top four only for Gylfi Sigurdsson's 80th-minute free-kick to stun Old Trafford.
United's frustrations were compounded as they lost Luke Shaw to a leg injury inside the first 10 minutes before Eric Bailly limped off in the second half with what looked to be an ankle problem.