AC Milan suffered a defeat to Monza away from home, leaving them further away from the league leaders.
Samuel Chukwueze returned from the AFCON tournament and was slotted into the starting line-up against Monza.
However, his presence on the team did not help them avoid a defeat, as AC Milan lost 4-2 on the night.
As it happened
Monza's manager made four changes to his team that played a 0-0 draw with Hellas Verona last weekend.
Super Eagles star Samuel Chukuweze was named in the starting lineup after just returning from Ivory Coast.
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AC Milan's manager, on the other hand, made six changes to his side that defeated Rennes in the Europa League playoff.
The home side opened the scoring in first-half injury time from the penalty spot before the end of the first half.
Matteo Pessina ran up to the ball, stopped, and waited for Mike Maignan to commit before slotting the penalty low into the middle of the goal.
The second goal came in shortly after the first goal. A great pass found Dany Mota in acres of space after a fine counterattack. He brings the ball under control before firing it past the helpless keeper from close range.
The second half started and AC Milan got in trouble when Jovic was sent off by the referee after a VAR review.
Shortly after, AC Milan got a goal for themselves when a cross into the box was headed down by Christian Pulisic, and Olivier Giroud did brilliantly to get to the ball and fire home to kickstart a comeback.
AC Milan got the equaliser when Christian Pulisic received the ball inside the box, reacted quickly and without any problems stabbed the ball inside the left post.
The away side thought they could manage the game till the end, but Monza got the winning goal of the game.
Warren Bondo collected a good pass and slammed the ball from mid-range into the top right corner, giving the goalkeeper no chance.
The home side added the icing on the cake in injury time when Lorenzo Colombo took a great first touch to control a killer pass on the edge of the box and drilled a shot into the bottom right corner in trademark fashion.