Okay, Tsonga has just beaten Blake, meaning Del Potro is now the 7th qualifier for TMC, and this is relevant for tomorrow's "winner takes all" match:
the final = Tsonga #7 for TMC
; Simon is #1 alternate; Blake #2 alternate; (Nalbandian #3 alternate)
the final = Tsonga DOES NOT
qualify - #9; (Nalbandian qualifies by right, at #7)
; Tsonga is #1 alternate; Simon #2 alternate; Blake #3 alternate.
Either way, it looks good for Jo (#8, for tonight), now...even if he doesn't win tomorrow, if Dave keeps his word (that he isn't going to Shanghai), Jo is first in line to take his place.
With Rafa's current form and suggesting that he may not be able to play, the dream scenario is Nalby winning tomorrow and Rafa withdrawing, which would result in a really nice fast court entry list:
7. Del Potro