Only the top two teams in the group stage will advance to the Libertadores Round of 16. The third-placed team will compete in this year's Copa Sudamericana.
There are seven Brazilian teams in the competition. Current Libertadores champion Flamengo is in Group A, which also includes Racing (Argentina), Aucas (Ecuador), and Ñublense (Chile).
The green team must win by two or more goals difference to qualify. If the score at the end of 90 minutes is tied, the decision will be made in a penalty shootout.
In the quest to return to the final of the continent's largest tournament after 17 years, Athletico-PR has the advantage of a draw in the return match.
Athletico-PR's next opponent is Palmeiras (Brazil), which secured a spot in the semifinals, defeating Atlético-MG (Brazil) by 6-5, on August 10 in a penalty shootout.