This weekend is Davis Cup time and Serbia and Croatia will be going up against one another. As you might already know, the two countries don't really like each other.
Nevertheless, it will be all tennis when the players take on the court. As for the fans, that might be another thing altogether.
The two will be playing in Croatia and the winning team will go into the semifinal. Even though Serbia might have a little advantage with Novak Djokovic, Croatia is not too worried about it with Marin Cilic on the side.