Valencia coach Cesare Prandelli says it's impossible to plan for Barcelona star Leo Messi.

The two teams meet later this afternoon.

"I will sleep very well because I know there is no formula to stop Lionel Messi, he is magnificent," Prandelli said in his pre-match press conference.

"Messi is fantasy football, he is what every child dreams about, because he is proof that when you have character, determination and talent you can make history. All the children in the world want to be Messi and I'm proud to face him."

Regarding the game itself, he added: "We'll need to maintain concentration throughout the game and be organized tactically. Whenever we lose the ball we need to press Barca quickly.

"When you face Barcelona you know you're going to suffer, but in certain moments of the game we have to know how to make them suffer."