Mario Pasalic scored twice to get Atalanta back to winning ways with a 3-0 Lombardy derby victory at struggling Brescia as Fiorentina fell to a third consecutive defeat at home to promoted Lecce.
Pasalic nodded in the opener on 26 minutes for Atalanta, before grabbing a second after an hour with Josip Illicic firing in a late third to end the Bergamo side's four-match winless run in the league.
Atalanta, boosted by claiming their first ever Champions League win against Dinamo Zagreb in midweek, are now level on points with fourth-placed Cagliari and Roma, who play later this weekend.
Gian Piero Gasperini's side had not won in Serie A since their 7-1 victory over Udinese a month ago.
"There was a bit of fatigue, we were scraping the bottom of the barrel in terms of energy," said Gasperini.
"I shouted at the players a few times to try to spur them on to close out the game...
"We're more tired (from playing in the Champions League), but we are training at a higher level and getting used to it."
- Ribery injury blow -
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"Ribery was disappointed at not being able to continue," said Montella. "It was a very heavy blow to his ankle."