Brazil international midfielder Lucas Lima netted just before the hour mark and former Valencia striker Ricardo Oliveira doubled the hosts' lead in second-half stoppage time on Sunday, reports Xinhua news agency.
Despite their poor run of form, Corinthians remain seven points clear of second-placed Gremio with 50 points from 23 matches.
In other match here, forward Roger stuck a second-half brace to hand Botafogo a 2-0 victory over local rivals Flamengo.
It was Botafogo's ninth win of the season, leaving them seventh in the 20-team standings with 34 points from 23 matches. Flamengo remain fifth with 35 points.
In other matches on Sunday, Coritiba drew 1-1 at Atletico Paranaense, Avai won 1-0 at Sport, Fluminense drew 2-2 at Vitoria and Cruzeiro won 2-1 at Chapecoense.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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