Di Maria got the winner midway through the first half when he lobbed Ederson after full back Renan Lodi failed to cut out a long through ball.
Argentina’s win was a particular triumph for Barcelona striker Lionel Messi, who picked up his first ever title in a blue and white shirt after more than a decade of club and individual honours.
Messi, who missed a golden chance to score with two minutes remaining, finished the tournament’s joint top goalscorer with four goals and was elected joint best player along with Neymar.
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