Messi holds the records for most caps and goals for Argentina, and his career at club level with Barcelona has ensured his legacy will be intrinsically linked to the sport for the rest of time.
But there remains a niggling frustration with respect to his time with Argentina, given he is yet to win a major international tournament with them. It is arguably the final piece of the puzzle and the one thing that separates him from the others in the 'greatest of all-time' debate.
Cristiano Ronaldo, Pele, Diego Maradona – they all enjoyed success on the international stage, and while it would be unfair to suggest Messi's legacy will not match up to theirs without honours with Argentina, it is a fact that would be continuously used to downplay his claim regardless of winning everything at Barca.