Contact Zones and Culture

There are many examples of what I think are contact zones in my community, such as coffee house's, parks, town squares, etc. However, I would like to draw attention to a recent event that occurred at the Australian Open tennis tournament. After a match between Serbian, Novak Djokovic, and Bosnian, Amer Delic, an ethical fight broke out outside of the stadium. I would certainly think that this is an example of a contact zone because it clearly shows how two different cultures are clashing. The interesting thing about this is that just before the fight broke out, both players (who are friends) congradulated each other on a good match. I find it funny that a fight even happened after the fans of the players had seen this.