 A play-off match in a neutral stadium had to be played between Atlético and Flamengo to decide which one would advance to the semifinals.The match was played on 21 August at the Serra Dourada Stadium, in Goiânia, a ground selected by Flamengo.Atlético chose the referee of the encounter, José Roberto Wright.In the match, Atlético forward and best player Reinaldo received a straight red card from after fouling Flamengo's Zico at 33 minutes, in what was described as a "normal" foul and "without much violence".