Thiem should be able to secure a victory against either Sijsling or Haase. The doubles are also uncertain. Austria big favourite in this one.
In case Haider-Maurer will play then Holland would be favourite.
I like Thiem, but no way he's "able to secure a victory against Sijsling or Haase" ! He just lost to Gicquel this week...
He's improving and I think he can take a set to those players, but to win would be an upset, so considering this upset "secure"...
Columbia is also my fav against Japan because I don't think Nishikori will play it.
But Japan will probably choose a very fast surface which can help them especially against Giraldo (Falla can be decent in indoor)