Livaja is on-loan from Inter Milan and has admitted he was wrong.
"First of all I want to apologise to the club, the President, the Coach and the rest of the squad," he told calciomercato.com. "I promise, in the future, I will do right on and off the field.
"I have decided to open a new page on my career.
"Again, I was wrong and I want to apologise.
"But I want to point out that he did not bleed, and I was not laughing after the incident."