Well, TBH I feel the other way around. How can someone end the year as #1 by not winning any M1000s. Has anyone achieved this feat yet? Even worse than that he has reached only 5 atp Finals this year. You can't just play at slams and then rest and chill out while other are working their ass off in multiple tourneys. Still he would mostly end this year as #1.It's a weird world where a guy who won 3 slams might actually lose the YE #1 ranking to a guy who won one slam.
I can't see Novak travelling all the way to IW to pad his lead by another 1,000 points, assuming he'd win. He already holds the YE #1 record, I wouldn't play much if I was him. It's been a mentally exhausting year, to put it mildly.