The 2021 Campeonato Brasileiro Série A (officially the Brasileirão Assaí 2021 for sponsorship reasons) was the 65th season of the Campeonato Brasileiro Série A, the top level of professional football in Brazil, and the 18th edition in a double round-robin since its establishment in 2003.
Atlético Mineiro were the champions, winning their third Série A title on 2 December 2021 with two matches to spare after they defeated Bahia by a 3–2 score.
[1] Twenty teams compete in the league – the top sixteen teams from the previous season, as well as four teams promoted from the Série B. América Mineiro and Chapecoense became the first two clubs to be promoted on 12 January 2021 after a 0–0 draw against Náutico and a 2–1 win against Figueirense, respectively.
[3] The final team to achieve promotion were Juventude on 29 January 2021, sealing a return to the top flight after a thirteen-year absence.
The table lists the positions of teams after each week of matches.In order to preserve chronological evolvements, any postponed matches are not included to the round at which they were originally scheduled, but added to the full round they were played immediately afterwards.