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Brazilian association football league
The Campeonato Brasileiro Série A, commonly referred to as the Brasileirão, the Série A or the Brazilian Série A, is a professional association football league in Brazil and the highest level of the Brazilian football league system. Contested by 20 clubs, it operates on a system of promotion and relegation with the Campeonato Brasileiro Série B. In 2021, the competition was chosen by the IFFHS as the strongest national league in the world.