A keenly-fought contest in Bergamo finished with a blank scoresheet despite each side creating a handful of golden scoring opportunities, with goalkeepers Juan Musso and Samir Handanovic excelling between their respective sticks.
Atalanta stay eight points back in fourth but can take huge credit from their display with a host of key players unavailable injured or with Covid-19 infections.
Edin Dzeko nodded wide the first clear chance of the night with a quarter of an hour gone, and 10 minutes later Musso kept the scores level with an outstanding save from Alexis Sanchez's close range effort.
Atalanta are expected to fight in Europa League against powerful Greek side Olympiakos.