Novak's primary hope is the frustrate Nick through high-level consistency and defense. If he can do that, Nick has proven that he can cause his own problems by losing focus and self-destructing. The main thing on Nick's side is the utter disbelief and excitement of ending up in a slam final well-rested courtesy of Rafa.
I would be nice to see a well behaved pair of players complete a final. I expect Novak to win, but Nick has a serve and some tough shots. Novak wins if it goes to 5 sets.