Argentina beat Brazil 1-0 in the Copa America final, with Lionel Messi winning his first international senior trophy with Argentina.
Messi had previously lost three Copa finals and a World Cup final.
"I can't explain how happy I feel. I've been sad many times [with Argentina after tournaments] but I knew it would happen and there's no better moment. This team deserved it," said Messi after the match.
Messi was named the Player of the Tournament after scoring four goals and registering five assists.
Messi also paid tribute to manager Lionel Scaloni.
"It's to the merit of [Scaloni] because of everything he's done and what he's built. The process with him started three years ago and it's been constant growth. He knew how to build a spectacular group, a winning group. He deserves the recognition. It's been a long time since Argentina were champions of South America, and we've won it again under him."