Juventus coach Max Allegri was asked about the violence on Sunday after defeat to Torino.
The Juventus team bus had windows smashed and there were 11 injured Granata fans by a firework thrown by Bianconeri supporters into the stands.
Allegri remarked: "I can only say these things ought to be avoided.
"I am very sad, because it was a fair and gritty match on the pitch. Unfortunately off the field we are still a long way off the right track in Italy and more should be done to improve the situation if we want to bring children and families back to the stadium."