Bologna fans have reportedly attacked Blerim Dzemaili outside their training ground.
La Repubblica reports Dzemaili had stopped to give some autographs at the Casteldebole ground on Thursday afternoon.
He wound down the car window and was signing, but when their manner became aggressive, he asked them to calm down.
One of the ultras then allegedly threw a punch at Dzemaili, who managed to move out of the way and drive off.
Bologna called the police, but by the time they arrived, the individuals in question had already run away.