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Lionel Messi can only "seal his legacy" by winning the World Cup with Argentina, former United States coach Jurgen Klinsmann says.
Messi has won nearly every club trophy available to Barcelona, but he's never received a major honour with his national team.
Argentina finished as runners-up at the 2014 World Cup as well as at the Copa America in both 2015 and 2016 -- knocking out Klinsmann's U.S. squad in the semifinals last year.