Oh, to be a trophy.
Yes. Congratulations Novak Djokovic on many things: first US Open title, fourth career major, 10th title of the year, 64-2 record, 3 Slams in a single year, sixth straight win over Rafael Nadal, and beating Roger Federer and Rafa back-to-back. Pretty massive list of accomplishments.
So where do you go from here? From the horse's mouth at his post-match presser:
There is still a lot of things to prove, you know, to myself, to the tennis world.