The Reds captain knows that if his team mates become too obsessed with Messi, it just opens the doors for other good players to come up and do some damage.
When United lost to Barca in 2009, Messi scored and Vidic and co are not likely to forget it, but they will also be keeping their eyes on others.
“Messi is a great player and is really hard to stop,” said Vidic.
“But I would not underestimate the other players they have like Xavi and (Andres) Iniesta, they’re really good players who can produce good performances in the vital games.
“It is not just about one player. It’s about stopping Barcelona as a team.”