for years. let s get to cnn s paula hancocks live in melbourne, australia. this situation is casting a light not only on the world of tennis but australia s immigration policy. reporter: it certainly is, boris and christi. this has been playing out across the world and we re coming to a head at this point as we will find out, potentially, by the end of monday whether or not novak djokovic will be allowed to stay in australia and play in the australian open. otherwise, if it doesn t go his way in that court case on monday in that hearing, then he will be deported from australia. the other option, this could be prolonged within the courts and then, of course, it s up to whether he has permission to play in the australian open while the legal protceedings ar ongoing. i m outside where he s being held in the immigration facility, it s a festive atmosphere, the pro-djokovic