Will Barcelona do what Real Madrid did?

UEFA has announced that Barcelona comeback is not impossible, because years ago this was made from three other teams.
“Only three clubs have managed to go further in the UEFA competition since the first game they lost 4 :0, Real Madrid, Leixoes and FC Partizan,” wrote the official UEFA website.

Barcelona has already scored three goals against PSG and there is a lot to be played until the end and everything is possible.