AC Milan needed extra-time to overcome a spirited Crotone side, with goals from Giacomo Bonaventura and M'Baye Niang eventually sealing a 3-1 win in the Coppa Italia fourth round.
Milan striker Luiz Adriano broke the deadlock just after half-time but Crotone - second in Serie B - shocked San Siro when Ante Budimir drilled home from close range 21 minutes later.
Crotone goalkeeper Alex Cordaz made a number of saves to send the game to extra-time but could do little to keep out Bonaventura's 106th-minute free-kick, which flew up and over the wall and into the corner from the edge of the area.
Niang then made sure of the win and a last-16 tie with Sampdoria as he coolly slotted into the bottom corner from 12 yards after a good run from Riccardo Montolivo, with Milan coach Sinisa Mihajlovic ultimately able to celebrate a sixth win in eight matches in all competitions.
Alessandro Gazzi scrambled the ball in with just three minutes on the clock before Emiliano Moretti made it 2-0 10 minutes later.
Spezia edged the battle of the Serie B strugglers as they overcame Salernitana 2-0 at the Stadio Alberto Picco to book a match with Roma.
