Manchester United hero Dwight Yorke says Ole Gunnar Solskjaer's team must be perfect against Champions League opponents Barcelona.

Yorke helped United clinch the Treble with a 2-1 win over Bayern Munich at the Nou Camp 20 years ago.

Former striker Yorke, 47, told United's website: "I don't think we can stop Messi,

“I think that you have got to concentrate on your game. I think we have to play the most near-perfect game to overcome Barcelona.

“We know that Messi is arguably the world's best footballer in our generation, and when you have that sort of mentality, it is always difficult.

"But I feel if we play the team collectively and we play to our potential, even with Messi's greatness, I think we may just have the edge on them.

"Of course, you need a little bit of luck in those games to go your way.

"And if we can get that on the night, there is no reason why United cannot come out victorious in those two-legged games."