Media reports in the peninsula claim that ahead of the sides' Champions League Group F game in Naples, home fans attacked the French outfit's bus with rocks and smashed a window in the process.
However, Marseille defender Souleymane Diawara said after the match that he did not notice the damage caused to their bus until after he had got off it.
"I did not hear anything because I was listening to music," the 34-year-old told RMC. "I did not see the broken window until I left the bus. When you're focused on the game, you don't notice anything around you.
"There was a great atmosphere at the stadium. However, everybody had told me that Naples would be hell, so I had expected an ever more hostile reception."
Marseille suffered a 3-2 defeat to Napoli and are now without a single win in four matches in the competition.