FC Barcelona legend Ronaldinho has explained how he believes Manchester United can shake up the tie when they take on the Spanish giants at the Camp Nou in the second leg of their UEFA Champions League quarter-final on Tuesday night.
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The Blaugrana go into the clash as favourites to advance to the semi-finals with a 1-0 on aggregate lead.
Despite tipping them to qualify for the next round, Ronaldinho feels United could cause some concern for the Catalan giants by scoring the first goal on the night.
"The truth is that Barcelona should have finished the game in Manchester – but at just 1-0, Manchester United will still believe they are in this tie," he said, according to the Daily Mirror.
"With the way that Barcelona have been playing and the amount of goals they have been scoring, I do expect them to progress.
"I see them even winning comfortably in Barcelona. It will all be on the first goal.
"If Barcelona score it, then it will be a long evening for Manchester United.
"But if they (United) can score the first goal, then it's going to make the stadium nervous – and you never know what can happen then."
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Ronaldinho played against the Red Devils twice in his career, losing on both occasions.
Who do you think will advance to the next round, Barca or United? Let us know in the comments section below.