The Campeonato Brasileiro Série A, commonly referred to as the Brasileirão, the Série A or the Brazilian Série A, is a Brazilian professional league for men's football clubs. At the top of the Brazilian football league system, it is the country's primary football competition. Contested by 20 clubs, it operates on a system of promotion and relegation with the Campeonato Brasileiro Série B. In 2021,... Wikipedia