Messi, 25, has not replicated his record-breaking form seen at Barcelona when it comes to performing on the international stage.

And it has prompted some to question his dedication to Argentina, while others have questioned his effectiveness without the presence of his La Liga team-mates.

Speaking to Radio Del Plata, Vanessa Sabella claimed Messi lacks 'heart' and has urged the star to strike the balance required to scale the heights for country as he does for club.

"I will not deny that he is a skilled player who has broken many records," she said.

"He is the best player in the world and never plays badly, but he still lacks some heart (for Argentina)."