The Brazilian football league, officially known as the Campeonato Brasileiro Série A, is the top professional football division in Brazil. It features 20 teams competing annually, with each team playing 38 matches. The league operates on a promotion and relegation system with the lower divisions, allowing for dynamic competition. Founded in 1971, the league has produced many legendary players, including Pelé and Zico. The season typically runs from May to December, culminating in a champion based on total points. The top teams qualify for international tournaments like the Copa Libertadores and the Copa Sudamericana.