Ole Gunnar Solskjaer says past triumphs do not matter as Manchester United will need a whole new effort to take down Barcelona.
Manchester United fell 1-0 in the opening leg at Old Trafford, leaving it all to do as the Red Devils had to Barcelona for the second leg.
The club previously overcame a deficit against Paris Saint-Germain in Solskjaer's first Champions League knockout foray, sealing their spot in the quarter-final round.
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That PSG victory brought back memories of the triumph of 1999, when Solskjaer himself led the club past Bayern Munich in one of the Champions League's most stunning ever moments.