The UEFA Champions league kicks off today but United will wait until tomorrow to begin their campaign.
Manchester United great Rio Ferdinand claims the defense of the Red Devils would be their biggest undoing in the competition.
United will take on the Young Boys in Switzerland tomorrow night but they have been dubbed as favourites to come off the game with three points.
After embarassing defeats to Brighton and Tottenham in the Premier league, there were reports that Jose Mourinho could be handed the sack. Nonetheless, the Portuguese manager has stayed put and he has led the side to winning their last two games in the league albeit away from home.
There has been improvement in the display of United since the back to back defeats but Ferdinand has asked the fans of the club not to expect too much.
“They have got a Superman in goal but with the guys in front of him there are inconsistencies in terms of personnel every week. You can’t build a defence on people that are not going to be reliable.
“You have got two wingers [Ashley Young and Antonio Valencia] playing full-back, and they have been the better defenders.
“Has [Victor] Lindelof worked? No. Has [Eric] Bailly worked? No. [Chris] Smalling and [Phil] Jones, they have not kicked on. I think United will get out of the group, but not much further.”
United last got to the final of the competition in 2011 but there is the general belief that Jose Mourinho is the man to bring back the Champions league glory to the side.