In the all-Brazilian final on Saturday, Flamengo defeated Athletico- PR by a single goal.
The only goal in the final was scored by Gabriel Barbosa.
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Barbosa scored two goals in the final victory against Argentina's River Plate to give Flamengo the win.
Barbosa scored his first goal in a final.
Barbosa scored the only goal in the final last year in the loss to Palmeiras and has a chance of playing for Brazil in the World Cup.
Barbosa scored in the 43rd minute when Athletico defender Pedro Henrique was booked for the second time. The goal came in the last seconds of the first half because of the incident.
Barbosa had to push the ball into an empty net after a low cross from Ribeiro.
Tolima, Brazil's Corinthians and Argentina's Velez Sarsfield were knocked out in the first round of the tournament.
Pedro, who is expected to be in Brazil's World Cup squad, scored 12 goals in 13 games.
According to Dorival Jr., Barbosa was key to the title because he played on the flanks to feed Pedro.
He was decisive in one title as the top goal scorer and now as a team player. Gabriel worked for us more than he did last year.
In winning the South America's equivalent of Europe's Champions League, Flamengo had more possession and created more chances than any other team.
Athletico couldn't give a perfect sendoff for their coach. The manager of the World Cup-winning team said he was stepping down at the age of 73. He won with Palmeiras and Gremio.
The tickets for the final were hard to sell. Guayaquil is close to Rio and Curitiba.