Juan Mata believes anything is possible as Manchester United prepare to overcome a one goal deficit against Barcelona and progress to the Champions League semi-finals.
Ole Gunnar Solskjaer's side will need to pull off another impressive European comeback if they're to book their place in the next round after a Luke Shaw own goal gave the La Liga giants the edge.
United go into the clash at the Nou Camp on Tuesday night as underdogs due to current form and result in the first leg. However, after a unprecedented result in Paris in the quarter finals there is belief United can pull off a dramatic win again.
"Being 0-1 behind isn’t a good scoreline, but we are Manchester United and when you wear this shirt anything is possible," Mata wrote in his weekly blog.
"It is something that I have already repeated on many occasions, but it is real, and we have experienced it several times this season.
"We are now in what could be the final four weeks of the season and every game is key. You have to mix your desire with responsibility, but you always have to be fully motivated."
United go into the game off the back of a 2-1 win against West Ham in the Premier League, but, Mata, who started the game, admitted they were not happy with their performance.
"In all honesty we didn’t play well," Mata said. "They were three very important points against an opponent who knew how to play against us and did not make it easy. It was a key win heading into the run of four important and difficult games that we have in April."
Manchester United squad vs Barcelona revealed
Manchester United great Paul Scholes is right about Ander Herrera
