There are no guarantees in life, you may have decided where you want to go to university, but they have to agree that they would like you to study there.
As I have mentioned in other posts, I applied a very, very long time ago. So I can in no way say that I am en expert on the selection criteria a university might have. Why not ask them? If you do and they tell you, do me a favour and let me know what they say.