Lazio celebrated after their 1-0 win at the San Siro
Lazio have accused the media of a "simplistic tendency" to blame all of the club's fans for instances of racism and fascism following incidents in their 1-0 Coppa Italia win at AC Milan.
Some Lazio fans held a banner honouring former fascist leader Benito Mussolini near the city's Piazza Loreto.
There was also racist abuse aimed at Milan's Tiemoue Bakayoko and Franck Kessie at the San Siro.
Lazio said they distanced themselves from "behaviour and demonstrations".
The club added in a statement: "Lazio reject and contest the simplistic tendency of the media to consider the entire Lazio fanbase responsible for the actions of a few isolated elements, for motivation that has nothing to do with passion for sport.
"The club has always fought for the respect of law and fairness in behaviour."
The Serie A game between Milan and Lazio at the San Siro earlier this month finished with the home side winning 1-0, with both Bakayoko and Kessie holding up Lazio defender Francesco Acerbi's shirt like a trophy after the final whistle.
They were fined a total of 86,000 euros (£74,350) for the incident.
Earlier this month, Juventus teenager Moise Kean was racially abused in a game at Cagliari, with his team-mate Leonardo Bonucci widely condemned for then saying it was partly the striker's fault.
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Line-ups
Match Stats
Line-ups
AC Milan
25Reina
22MusacchioBooked at 70mins
33CaldaraSubstituted forCutroneat 65'minutes
13Romagnoli
2CalabriaSubstituted forContiat 40'minutes
79Kessié
14BakayokoBooked at 79mins
93Laxalt
8Fernández Saez
7Castillejo AzuagaSubstituted forCalhanogluat 57'minutes
19Piatek
Substitutes
10Calhanoglu
11Borini
12Conti
16Bertolacci
17Zapata
20Abate
21Biglia
39Tolentino Coelho de Lima
63Cutrone
68RodrÃguez
90Donnarumma
99Donnarumma
Lazio
1Strakosha
3Ramos MarchiBooked at 37mins
33Acerbi
15Jacinto Quissanga
27Orestes Caldeira
21Milinkovic-SavicSubstituted forParoloat 15'minutes
6Leiva
10Romero AlconchelSubstituted forBadeljat 85'minutes
19Lulic
11CorreaSubstituted forCaicedoat 75'minutesBooked at 78mins
17Immobile
Substitutes
4Gabarrón Gil
13Fortuna dos Santos
14Durmisi
16Parolo
20Caicedo
23Guerrieri
24Proto
25Badelj
30Lomba Neto
32Cataldi
66Cavaco Jordao
77Marusic
Referee:
Paolo Silvio Mazzoleni
Match Stats
Home TeamAC MilanAway TeamLazio
Possession
Home52%
Away48%
Shots
Home9
Away17
Shots on Target
Home2
Away10
Corners
Home7
Away5
Fouls
Home10
Away11
Source: bbc.com