#3 United have nothing to lose
As far back as when the draws were made, very few people gave Manchester United much of a chance of qualification, as the difference in class, the crop of players, as well as the form of the two teams, was vast.
This viewpoint has been further enhanced by the first leg result, with Manchester United needing at least two unreplied goals to stand a chance of progressing.
This has led many all but cast off Manchester United's chances for progress but this could very well play in the Red Devil's favor.
Given their status as the underdogs to progress in this tie, Manchester United very much have nothing to lose and everything to gain which could see them fighting tooth and nail in a bid to silence their critics and prove them wrong.
There is a cliched saying that the worst man to fight is one who has nothing to lose, and Manchester United are very much in such scenario and as such, Barcelona could find themselves with a lot more than they bargained for.