Ademola Lookman was the difference maker as Atlanta got past Fiorentina to move second in Italian Serie A and level on point with leaders Napoli.
Heading into Sunday game, Atalanta were unbeaten in 7 games but Fiorentina proved a stubborn test for as they played on the strong foot for the majority of the game.
Atlanta showed pedigree to take the lead after Luis Muriel found a sliding Lookman who tapped into an empty net for the Winner.