Livorno coach Serse Cosmi admits his players were rattled by fans invading their training ground last week.
Francesco Tavano was slapped by one ultra.
Cosmi said: "Francesco is shaken by what happened, but he is ready to play and give his contribution right to the bitter end.
"We are going through a very difficult time, but in these situations the only way to get out of it is to act like men. Real men."