AC Milan edged champions Juventus 1-0 in Serie A’s biggest clash played at the San Siro on Saturday.
The only goal of the game was scored by teen star Manuel Locatelli in the 65th minute.
The defeat brought Juventus’ run of six victories to a halt.
Also it was their second defeat of the league season after losing 2-1 to Inter Milan on matchday four.
Juventus were forced to an early substitution on 33 minutes following a hamstring injury to star forward Paulo Dybala who was replaced by Juan Cuadrado.
Despite the defeat, Juventus still stay top in the league table on 21 points from nine games.
AC Milan are second on 19 points also from nine games.