Wolves boss Mick McCarthy admits the backlash from his shadow selection last week hurt him.
McCarthy insisted he was not concerned about the reaction to his tinkering but was clearly still riled by the issue.
He said: "I have to be able to manage the club, manage the players, maximise my resources, pick teams and be trusted with it by everyone concerned.
"The day I'm not trusted is the day I get out of the door, so I have to be allowed to do that.
"People's opinions of my decision about the side I put out at Old Trafford, I'm not bothered with. One or two people's opinions of me, and my character, I might have trouble with.
"One or two dubious characters have been giving me a bit of stick, questioning my honesty and integrity, when I stand up for all those things.
"I've never cheated in my life, never done anything like that. Questioning my character hurts."