Argentina star Juan Roman Riquelme says the likes of Barcelona star Lionel Messi may never be seen again.

The Boca Juniors ace has refused to play for Diego Maradona's Argentina, but insists he is still hoping they win the World Cup.

On Messi, Riquelme said: "He's a unique player, the kind that might never be seen again. For Argentina, the boys will have to help Messi a lot if he is to play like he does for Barca."