This is too easy for Djokovic at the moment. Hitting the baseline with every return to put pressure on Nadal's serve and holding his serve with ease.
Edit: Yes, finally a break.
There's not an ounce of quit in Nadal, while Novak can still be a little fragile. Even at his best he would often suffer a dip in form during a match. Which player wears down the other first is anyone's guess right now. I'd say Nadal has the edge.