But Sir Alex has faith in his side and feels they will do themselves justice:
“It’s a big day for Phil Jones.
“He’s been out all season but has done enough training to make sure his fitness is okay.
“They’ve all been different types of injuries and because he is young, he’s still to develop physically.
“He’s only 20 years of age so there’s plenty of time for him.
“Most of them will have experience of big games and big crowds.
“Obviously for Nick Powell it’s completely different – he’s played in front of 76,000 as a substitute but this will be his first European away game.
“It will be a big day for him but he has the temperament, which is important.”