Rafa isn't playing Shanghai:
Hmmm. Sad news (at least for me) but a wise decision from Rafa. Health comes first!
It's a good move for Nadal. He has a clear lead and he'll be safe until the clay season. If he has another clay season like he's always had, then he'll have a good shot at finishing #1 next year as well and will have a chance to add points from the TMC. The only downside for him is that if he does mess up at one of the big tournaments, he won't have the buffer from the year-end points in case it's a close race. He wasn't going to risk his DC chances in any way.
I think Fed will be fine for TMC.