League leaders Fluminense staged a late comeback to beat Ponte Preta, while Palmeiras' hopes of survival were dealt another blow on Sunday.
Fluminense claimed an important 2-1 win at home over 10-man Preta courtesy of two goals in the space of 10 minutes.
The hosts found themselves a goal down as early as the second minute when Preta midfielder Luan hit the back of the net.
Preta were well organised following the opener and seemed relatively comfortable up until Wendel's dismissal, which reduced the visitors to 10-men with less than 20 minutes remaining.
And Fluminense took full advantage of their numerical advantage with Fred converting an 80th-minute penalty before defender Gum netted the winner inside the final minute.
Fluminense's victory maintains their nine-point lead ahead of Atletico Mineiro, who came-from-behind to overhaul 10-man Sport Recife thanks to a Leonardo brace.
Palmeiras' days in Brazil's top division appear to be numbered following a narrow 1-0 defeat at Nautico.
A 14th-minute strike from Kieza condemned Palmeiras, who played the final half-hour with 10-men, to a third consecutive loss.
Gilson Kleina's men are now nine points adrift of safety with eight matches remaining.
Sao Paulo accounted for Figueirense 2-0 to move up to fourth as Vasco da Gama slumped to a 2-0 defeat at Santos.
Brazil international Luis Fabiano scored his fifth goal in four games and Douglas added a goal of his own for Sao Paulo, while Ezequiel Miralles bagged a brace for an improving Santos side.
Sao Paulo are two points clear of Vasco, while Gremio remains third after their 1-1 draw against Botafogo.
Meanwhile, Coritiba continued their rise up the table with a 2-1 win over Bahia, their third in succession.