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The visitor surged into a three-goal lead within the opening 25 minutes, leaving the home side struggling to gain any sort of foothold in the contest.

Dominating possession with fluid attacking play, Bayern dictated the pace throughout the match, with Michael Olise at the heart of the attack, scoring a goal in each half.

Josip Stanisic, Serge Gnabry and Nicolas Jackson were also on target for Bayern before Jamal Musiala completed the scoring with a precise close-range volley in the 67th minute.

Mario Pasalic pulled one back for Atalanta deep in stoppage time, though the goal failed to lift the hosts' spirits.

The sides will meet again next Thursday in the return leg at the Allianz Arena.