Messi dreams of World Cup glory

Messi has won a host of top honours with Barca but has yet to taste major honours with the albiceleste, which is without a top title since 1993 and which flopped at the Copa America on home soil in July.

Many observers are puzzled as to why his club form rarely appears at international level.

"I still have this dream and that is to be a world champion and lift the Copa America with the national side. And I know I'll do it, I am convinced I shall," said Messi in an interview published on Monday with the Argentina Football Association.

"I don't have to demonstrate anything to anybody. I would love to win a title with the national team but I am just another one in the group who wants to do the best for Argentine football, nothing more."

Under new coach Alejandro Sabella, Argentina got off to a mediocre start to its World Cup qualifiers with an embarrassing loss to Venezuela but a recent win over Colombia put it on a more even keel and it is now level on points with regional group leader Uruguay - albeit having played a game more - and Venezuela.

"The group are doing fine. But we needed a win like that to strengthen ourselves. It has revitalised us," Messi said, recognising that "sometimes we don't quite get up to the mark either in terms of performance or the result. We are aware of that".

On the difference between playing for his country and Barca, with which he has just won the world club title, Messi said: "They are two different things. Barcelona are the best team in the world - even non-fans admit as much. That is the result of years of hard work with the same teammates.

"It's more difficult with the national side and we've been through a lot of chopping and changing of coaches in recent years," he said.

"But we are growing and I know we are going to achieve a lot."