Ultras from Juventus and Inter Milan are planning support protests for their AC Milan counterparts.
AC Milan were ordered to play their next home game against Udinese behind closed doors because of chants insulting to Neapolitans.
Inter ultras showed solidarity with Milan and now the Juventus 'Fighters - Curva Sud Scirea' have joined in.
"This is just another pointless and unconstitutional mechanism to discriminate against the ultras, condemning freedom of speech," read the Juve ultras statement.
"During the next game in Florence on October 20 we invite all the fans to sing along with us those 'famous' chants of territorial discrimination. We invite supporters everywhere to unite in our protest by showing banners and singing these chants in every stadium on Friday 18, Saturday 19 and Sunday 20 October."
