Serbia-Albania game was cancelled for skirmishes between fans.
There was a bit more to it than that...
Some Albanian nationalist(s) somehow flew a drone over the pitch carrying a Greater Albania flag. A Serbian player grabbed the flag and tried to bring down the drone, and then scuffles broke out among the players, which then developed into a riot involving the Serbian fans (Albania had no tickets for the match, so there were essentially no away fans) with some of the fans attacking the Albanian players.
Pictures here.
Some people are apparently suggesting that this fixture should join Armenia-Azerbaijan and Spain-Gibraltar as one to be deliberately avoided in draws.
