Bertolo was stopped in the city streets when his BMW was seen driving erratically in the early hours of the morning. It's then reported he attacked the police when they tried to give him a breathalyser test.
"I apologise to the police, the fans and the club," he wrote in a statement on the Palermo website.
"I deeply regret what happened and it really is not representative of the kind of person I am. I can guarantee to all of you that similar incidents will never happen again."