2009 Campeonato Brasileiro Série A

6th Campeonato Brasileiro title Santo André Náutico Sport Internacional São Paulo Cruzeiro Avaí Atlético Mineiro Grêmio Goiás Barueri Santos Vitória (19 goals each)

The 2009 Campeonato Brasileiro Série A was the 53rd edition of the Campeonato Brasileiro Série A, the top-level of professional football in Brazil. It was contested by 20 clubs starting on May 9 and ending on December 6. The 2009 edition was won by Flamengo.

The first goal of the tournament was scored by Igor on the 13th minute of the match between his team, Sport and Barueri, which ended in a 1–1 draw. Holders São Paulo had a bad start losing to Fluminense 1–0.

Internacional led the tournament from round 2 to 6, when Atlético Mineiro took the lead. In the 9th round, Internacional regained the lead but one round later Atlético Mineiro managed to come back to the top of the table after defeating their city rivals Cruzeiro 3–0. The club from Belo Horizonte held the lead until round 15, when Palmeiras reached the top. In the middle of the championship, Flamengo was only on the 10th position.

Palmeiras managed to stay in the top until round 34, when they lost 1–0 against Fluminense, which was struggling to avoid relegation. Four days earlier, São Paulo had tied 1–1 with Grêmio after having three players sent off.

Round 37 saw several changes in the standings. São Paulo could have won their seventh title, and fourth in a row, if they had defeated Goiás, exactly as it had happened the season prior. However, this time Goiás won 4–2, sending São Paulo from the top of the table to fourth place. Flamengo defeated Corinthians and took the lead for the first time in the tournament. Internacional advanced to second place and in the last round, needed both a win against Santo André and for their city rivals Grêmio to tie or defeat Flamengo in the last match. Despite rumors that Grêmio would not play as hard as they could, Flamengo had to come back from a 0–1 score to win the tournament. Internacional's 4–1 win was not enough.

Palmeiras also came to the last round of the championship with chances to end in the top position. For that, they had to beat Botafogo, which would be relegated if did not win the last match. The result was tragic for Palmeiras: 0–2 defeat that combined with Cruzeiro 2–1 over Santos left the team outside the top four and, therefore, out of 2010 Copa Libertadores. Botafogo, together with city rivals Fluminense, managed to avoid relegation. After spending 37 rounds in relegation zone, Fluminense, which managed to leave the bottom four positions one match earlier, held a 1–1 draw away against Coritiba and sent the team from Curitiba to Série B exactly when the club was celebrating 100 years of foundation.

The 2009 edition of the Brasileirão marked the professional debut of players such as Neymar.