Not at all, on last Megdan event there was a fighter from Albania and there weren't any problems. And almost in every event in Serbia you had some Albanian, Croatian, Bosniak fighters.
Just like in Croatian events you always had fighters from Serbia. And there wasn't any single incident in all these events for last 20 years. I was on a lot of events on the Balkans and fans never were insulting or disrecpecting for fighters from different country.