That's a really nice summary, thanks for the link. Looks like a really interesting fight, especially because of one thing they missed, I think Wawrinka will play Basel, so it looks like Stan and Blake will play the same four events, with Wawrinka needing to outpoint Blake by a fair margin, potentially leading to an interesting head-to-head in a quarter or semi. Assuming, that is, that JMDP or Tsonga don't come over the top of them.
It's quite tough to see anybody else pulling it off, given current form, but you never know, of course. Hopefully someone from outside the top 8 will make a strong run and earn a spot with some big performances, rather than just grinding their way in with decent results.