Mexes punished for Chiellini punch
Former France international Mexes, 31, was sent off for two unrelated bookings in this meeting of Italian heavyweights.
The referee missed the punch, but retrospective action has been taken by the FIGC, the Italian football federation.
Reigning Serie A champions Juve came from behind to beat the Rossoneri with goals from Andrea Pirlo, Sebastian Giovinco and Chiellini.
Match winner Chiellini described his altercation with Mexes as “just not football”.
Victory for Antonio Conte’s Old Lady leaves them third in the league, level on points with Napoli and two behind early leaders Roma.
Mexes has now been sent off seven times in his nine-year Serie A career.