Belgium -v- United States Fed Cup Semi-final

This looked like it was going to be a barn burner of a semi, w/the top four players in the world (rankings be damned) competing for thier country. If Belgium were able to choose the surface, what surface do you think they'd pick.

Would they level the playing field and choose clay?
Try and prove themselves on hardcourts, or foolishly allow Jelena Dokic's tournament scheduler choose grass.