Fernando Torres has not found the net at all following his record-breaking £50million move from Liverpool in January but Vidic will not take the threat of him, Didier Drogba, Nicolas Anelka and Salomon Kalou lightly.
"We have respect, obviously, for their attacking players," said the Serbia defender, who will lead United out in the quarter-final first leg.
"It doesn't matter if they didn't score a goal.
"They will try to score and they will give their best.
"This is two games and, at the end of the day, it's most important who will go through and not who will score the goals."