Probably Almagro. If he manages to avoid Nadal's half of the draw in the French, or Nadal goes out early, he'll probably make the semis there. Tipsy is a choke artist and I think he throws his matches at times...
Very likely scenario.
It's Tipsy. He has a good shot at the USO, should've done it this year to be honest. Almagro is just not good enough to win a QF