Jose Mourinho believes Manchester United can pull off a surprise victory against Barcelona but has warned his former club that Lionel Messi will want to 'leave his footprint' at Old Trafford.
Ole Gunnar Solskjaer's side go into the game as underdogs, just as they did against Paris Saint-Germain in the last round, but despite the expectancy that Barcelona can book their place in the semi-final there's a belief United can cause another upset.
United pulled off one of greatest European comebacks against PSG in the last round and Mourinho believes they could do it again.
"United this season was capable to win against Juventus and against PSG why not to do it against Barcelona?" Mourinho told RT.