This event is so interesting this year.
Santoro/Murray 3R, Haas/Youzhny 3R, and Gasquet/Blake or Mahut 3R. I think it's safe to say these are the three most important matches prior to the quarterfinals concerning who will get to the TMC. Although it's safe to say whoever wins between Haas/Youzhny probably would get farther in the event more likely, and Murray/Gasquet have to win more matches than Haas does to surpass him.
Anyone can win those three matches, should be good stuff.