The 2018 Campeonato Brasileiro Série C was a football competition held in Brazil, equivalent to the third division. The competition started on 14 April and ended on 22 September 2018.[1]
In the group stage, each group was played on a home-and-away round-robin basis. The teams were ranked according to points (3 points for a win, 1 point for a draw, and 0 points for a loss). If tied on points, the following criteria would be used to determine the ranking: 1. Wins; 2. Goal difference; 3. Goals scored; 4. Head-to-head (if the tie is only between two teams). If tied on aggregate, the away goals rule would be used (except if both teams shared the same stadium); 5. Fewest red cards; 6. Fewest yellow cards; 7. Draw in the headquarters of the Brazilian Football Confederation (Regulations Article 15).[6]
The top four teams of each group advanced to the quarter-finals of the knockout stages.
Each tie was played on a home-and-away two-legged basis, with the higher-seeded team hosting the second leg (Regulations Article 17).
If tied on aggregate, the away goals rule would not be used, extra time would not be played, and the penalty shoot-out was used to determine the winner (Regulations Article 16).
Starting from the semi-finals, the teams were seeded according to their performance in the tournament. The teams were ranked according to overall points. If tied on overall points, the following criteria would be used to determine the ranking: 1. Overall wins; 2. Overall goal difference; 3. Draw in the headquarters of the Brazilian Football Confederation (Regulations Article 17).[6]