Messi admitted that the team's performance was pleasing and the fact that they were able to say goodbye to the fans with a solid performance, instilled hope in the team for the FIFA World Cup in Russian Federation.
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La Albiceleste almost missed out on a place in next month's World Cup but for the exploits of the pint-sized magician, as his brilliant hat-trick against Ecuador last October helped guide the nation to Russian Federation, after it looked certain that Jorge Sampaoli's men would fail to qualify.
Messi, 30, has been on the losing side in four finals with Argentina, including the World Cup final in 2014 against Germany in Brazil.
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In an interview with ElTrece, Messi said: "The other day I was speaking with a my friend, and he told me, 'Look, if you had stayed with Spain, you would be world champion.' But it would not have been the same".
"I believe so, I have faith in this team", he said.
In Group D, Messi's men will face Croatia on June 21, and Nigeria on June 26. It's important to start off with a win to build confidence.
Nevertheless, the victory will boost fans' hopes that Messi can lead two-time champions Argentina to glory in Russian Federation.
"We have players to be able to dream".
Messi has now revealed he was first approached to play for Spain when he was on tour in Finland with the Blaugrana, but already he had his heart set on playing for his country of birth. Iceland showed in the Euros that they can go up against anyone.
"The other day I was talking to a friend and he told me "if you had chosen Spain, you'd be a World Cup victor already", but it wouldn't have been the same", he added.