League leaders Juventus came from behind to beat Serie A rivals Napoli 3-1 on Saturday night.
The Turin club have also been issued with a 10,000 euro (£9,050) fine for the offensive nature of the abuse.
Serie A’s disciplinary panel said in a statement on Tuesday there had been an “evidently racist” chant directed towards Napoli defender Kalidou Koulibaly early in the second half.
Napoli have also been hit with a fine of some 15,000 euros (£13,500) after one of the club’s supporters, who has now been identified, threw a seat into a section of Juventus fans.
League leaders Juventus came from behind to beat their Serie A rivals 3-1 on Saturday night, with Napoli defender Mario Rui shown a red card during the second half and so will now serve a one-match domestic ban.