The visitors continued to press their advantage, and a second goal arrived on the half-hour mark. Nikola Krstovic showed impressive awareness to lay the ball off to Davide Zappacosta in the box, who then slotted a composed finish beyond Mike Maignan.
AC Milan struggled to find a way back into the match, with Rafael Leao unable to beat Marco Carnesecchi. Despite their best efforts, the Rossoneri found themselves facing a two-goal deficit.
Atalanta remained in control, having lost only two of their last 11 top-flight trips to Milan. The visitors added a third goal in the 51st minute, with Giacomo Raspadori firing an angled strike into the top corner from Ederson's pass.
The loss marks a significant setback for AC Milan, who will need to regroup and refocus for their upcoming matches.
