Vizeu gave the goalkeeper no chance after skilfully bringing the ball down from a corner and hammering home, giving Gremio their first victory in six games and lifting them out of the relegation zone into 16th place.
Atletico remain second on 12 points, four behind champions Palmeiras, who beat Botafogo 1-0 in Rio de Janeiro earlier on Saturday.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
(Reporting by Andrew Downie; Editing by Peter Rutherford)
