Copa União Green Module

The Green Module of the Copa União is the tournament referred to the organizing body of the Clube dos 13, which is not officially recognized by the CBF, but which had reunited the most important Brazilian football clubs in the 1987 season.

First round
The clubs in Group A play against clubs in Group B.

Second round
The matches are played between the clubs inside their respectives groups.

Group A
Note: Since Atlético Mineiro had already won the first round, the second round runners-up, Flamengo, qualified for the semifinal. For winning both rounds, Atlético Mineiro earned an extra point in the semifinals.

Relegation
According to the original regulation created by Clube dos 13, the 13th and 14th placed teams would play a relegation play-off, and the 15th and 16th placed teams were directly relegated to the 1988 Second Level. However, the Clube dos 13 and the Confederação Brasileira de Futebol, entered into conciliation for the organizing body of the 1988 Campeonato Brasileiro, again under the full responsibility of the CBF, turning the relegations of Green Module invalid.