Santos and Palmeiras remain winless
Palmeiras remain winless after six games in the Campeonato after a 2-1 defeat by Corinthians on Sunday.
The visitors, who prop up the early-season table on two points, took and early lead through Mazinho but were pegged back by Romarinho's brace.
The only other team without a win are Santos, though they at least mustered their fourth draw of the season despite twice losing the lead against Coritiba. Edu Dracena put them ahead in the first half, but Rafinha equalised early in the second and Lincoln netted a penalty soon after Neymar had restored the hosts' lead.
Fluminense, by contrast, remain unbeaten after hammering Atletico Goianense 4-1 away from home.
Atletico actually led through Ernandes' 13th-minute goal but Samuel Goncalves equalised six minutes later and Gum made it 2-1 by half-time. Gilson's own goal extended Flu's lead before Deco netted a late penalty, after Marino was sent off for the hosts.
But they remain one point behind fourth-placed Gremio, who beat Flamengo 2-0 with goals either side of half-time from Marcelo Martins and Werley.
Elsewhere, Ponte Preta won 2-1 away to Botafogo, Internacional beat Sport Recife 2-0 and Figueirense and Bahia drew 1-1.