Former Bulgaria striker Dimitar Berbatov, previously of Manchester United, says Barcelona are favourites in the Champions League quarter-final clash but "PSG were too".
"It's true that Barca are the favourites but PSG were too in the last 16 and look that ended up. In football nothing, absolutely nothing, is safe. I hope that United are capable of forgetting their slip-ups and can put on a surprise."
"If they repeat the same mistakes they made in recent games against Barca, it's clear it will be too much, Barca will punish them without a doubt."
"If we're sincere, this dip in form from United has arrived at the worst possible moment. But sometimes something strange happens in football, it's easier to lose against smaller teams than the bigger ones. United's success will depend on how they handle Messi."