Defender Gilvan struck with a header just after halftime at Corinthians Arena as Atletico notched just their fifth win of the campaign on Saturday, reports Xinhua news agency.
Despite the result, Corinthians stayed top of the 20-team standings with 50 points from 22 matches, 10 points ahead of second-placed Gremio. Atletico remained last with 18 points.
In Saturday's only other match, Vasco da Gama beat Rio de Janeiro rivals Fluminense 1-0 thanks to a first-half strike from defender Ramon.
Vasco rose to 10th in the standings while Fluminense dropped to eighth.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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