[2] The draw for the first and second stage was held on 15 December 2017, 15:00 at CBF headquarters in Rio de Janeiro.
[3] Teams were seeded by their CBF ranking (shown in parentheses).
In the first stage, each tie was played on a single match basis.
The lower CBF ranked team hosted the match.
If tied, the higher CBF ranked team would advance to second stage.