Palmeiras were denied the chance to extend their lead in the Campeonato Paulista when they were held 0-0 by Mogi Mirim on Sunday.
The league leaders, managed by former Chelsea boss Luiz Felipe Scolari, could not find a winner at the Estádio Romildo Vitor Gomes Ferreira, and were down to ten men at the final whistle after goalkeeper Bruno Cortez was dismissed late.
Corinthians handed Santos their first loss in the league this season with a 3-1 triumph at Estadio Municipal Paulo Machado de Carvalho.
Fabio Santos scored a brace, while Liedson added a late goal to seal the match.
Former Manchester City and Galatasaray midfielder Elano scored the only goal for Santos.
Mirassol won their third consecutive match with a 2-0 victory over Linense at the Estadio Jose Maria de Campos Maia to move into second spot on the table.
Sao Bernardo went 2-0 up inside 18 minutes against Noroeste, and that was all they required to hold on for the win, with Danielzinho and Dirceu netting the goals at the Estadio Primeiro de Maio.
Ponte Preta brought up their third win on the trot, and their eighth game unbeaten, with a 3-1 come-from-behind victory over Botafogo at Estadio Moises Lucarelli.
Assis put the visitors ahead after 12 minutes with his first goal in the Paulista, but a stunning nine-minute goal spree saw Ponte Preta overrun their opponents to come out comfortable victors.
Ferron (30th minute), Marcio Diogo (32nd) and Dirceu Lucas (39th) were the goalscorers for Ponte Preta.