Atletico Mineiro's 1-0 win at Palmeiras extended their unbeaten run to four matches and took them top of the Campeonato.
Jo scored the only goal of the game in the 49th minute, leaving them with a record of three wins and a draw to start the season.
In the day's other game, Flamengo registered a first win of the campaign, 3-1 over Coritiba.
Vagner Love and Luiz Antonio put Flamengo two up inside 13 minutes only for Emerson to pull one back after 24 minutes. Hernane added his side's third in the closing seconds.