Olympique Marseille boss Didier Deschamps is convinced of shocking Manchester United at Old Trafford.
Deschamps insisted the goalless first leg has left the door wide open for his French champions.
Deschamps said: "We have the right not only to dream but to believe.
"We played a first leg that left the door open. Yes, United will be super favourites but even if we only have one small chance, we have to play to the end.
"When my players come on to the pitch at Old Trafford, I want them to have in the back of their minds the belief that it's possible to qualify."
