Frenchman Evra and his team-mates were given the runaround by Lionel Messi in the Italian capital last May as the Argentina superstar inspired Barca to a 2-0 win and their second Champions League title in four years.
Evra won the tournament with United in Moscow two years ago but the full-back admitted the pain of losing lasts much longer than the joy of winning.
Focused: Evra (right) wants to make amends for last season
In Germany ahead of facing Bayern Munich in the first leg of their quarter-final tie, Evra said: 'The one thing that sticks with me most about last year was the worst moment. That was the Champions League final defeat against Barcelona. That's what has stayed with me because I'm a winner.'
The 28-year-old believes United have learned from their disappointment.
He added: 'Barcelona won the final because they played really well. But even so, I'm frustrated because I feel we didn't show the real Manchester United.
'We were a bit too confident and sure of ourselves, and we were caught cold. True, we won the league title and the Carling Cup, but missing out on winning the Champions League again had the most impact on me.
'That bad moment affected me more than any other moment from last season.'
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