Lionel Messi joined his Argentina team-mates on Tuesday afternoon in preparation for the friendly with Italy on Friday evening.
Arguably the most famous footballer on the planet joined the squad later than his team-mates following Barcelona's match on Sunday.
Members of the world's press gathered to catch a glimpse of a player who has thrilled fans around the globe for club and country over the past decade.
Messi, who took part in a session that included Nicolas Otamendi and former City keeper Willy Caballero.
Sergio Aguero remains doubtful with a training knock he picked up with City.