Andres Iniesta told his Barcelona teammates to "be careful" as Lionel Messi made an astonishing impression during his early days with the senior squad.
Messi made his competitive debut aged 17 in October 2004 having earned a call-up to first-team training the previous year.
He would go on to score 672 senior goals across 17 trophy-laden years with the Blaugrana, establishing himself as the player many believe to be the greatest of all time.
