Former Chelsea and Barcelona star Deco says Lionel Messi is "impossible" to stop.

Barca go to Chelsea next week for the first-leg of their round of 16 Champions League clash.

Deco told Omnisport: "What I can say is that, when you have a player like Messi, be it any team in the world, you have a little advantage.

"Messi is not only a goal scorer, he creates, he defines the way the opponent defends their approach, their training.

"Coming up against Messi, things aren't going to be easy. They are going to be a lot different for the opposition, because he's unpredictable in one-on-one duels, and also with his passes. And obviously, the other team ends up very reactive to what he does on the field."