I truly hate Mourinho's double standards when it comes to selecting players. Pereira had one questionable game against Brighton (when it was generally a bad performance all round by the team) and he hasn't been seen since virtually at all. Matic however, has been rubbish for weeks if not months, yet is selected religiously every game.
It took Mourinho far too long dropping lukaku, he does exactly the same thing with his other favourite: Matic the static man. Had a few good games in a United shirt since he has come, been utterly rubbish most the time. I have no idea what he even adds to this team now.