Quartet stay perfect in Brazil
Vasco da Gama lie second in the Brazilian Campeonato following a 3-0 win over Atletico Mineiro on Sunday.
Bernado, with a penalty, Enrico and Elton Brandao scored the goals. America had Dudu sent off in the second half.
Corinthians are third following their 2-1 defeat of Coritiba, Paulinho and Danilo scoring for the winners. Leonardo got Coritiba's consolation.
Flamengo are fifth after being held to a 3-3 draw away to Bahia. Jobson (2) and Marcelo Lulina scored for Bahia who also had Santos Helder sent off. Ronaldinho, Dario Bottinelli and Junior Egidio scored for Flamengo.
Ramon Anselmo scored for Cruzeiro in the 1-1 draw with Palmeiras whose goal came from Michel Luan.
An own goal by Atletico Paranaense's Rafael Santos gave Gremio a 1-0 win.
Leandro Euzebio scored to earn Fluminense a 1-0 win away to Atletico Goianiense.