Re: What does Djokovic have to do to end the year as #1?
He doesn't deserve the number one ranking (winning one slam to Nadal's two) and is not going to be able to stop Nadal, who is already nearly tied with him and only has points to gain for the rest of the year. Nadal is going to be number one for 2013. There is nothing Djokovic can do short of bribing Nadal to not play any more tournaments until January.
It will be good for Nole to be number #2. It will inspire him to work harder and raise his level of tennis yet again to compete with Nadal (and Murray, too, especially at Wimbledon).
Americans, Canadians, Brits, Del Potro, Nishikori, Tsonga, Monfils, Karlovic, journeymen, underdogs, mugs, pushers, servebots, forehandbots, and whomever else I feel like rooting for (on any given day it might be Federer, Nadal or Djokovic since they are all awesome)
"It’s not just the athletic artistry that compels interest in tennis at the professional level. It’s also what this level requires -- what it’s taken for the one-hundredth-ranked player in the world to get there, what it takes to stay, what it would take to rise even higher against other men who’ve paid the same price number one hundred have paid." -- David Foster Wallace