Campeonato Brasileiro Série A
The Campeonato Brasileiro Série A, often referred to as Brasileirão, is the top professional football league in Brazil. Established in 1971, it features 20 teams competing annually for the championship title. The league operates on a system of promotion and relegation with the Campeonato Brasileiro Série B.
Each season, teams play 38 matches in a round-robin format, where every team faces each other twice, once at home and once away. The team with the most points at the end of the season is crowned the champion, while the bottom four teams are relegated to the second division.