Spain will win b/c they have the home court advantage.
I'm rooting for Argentina b/c last time the Spaniards played against the USA, they complain about the surface and demand for a change. They only think for themselves.
Tier1(goat): Federer; Tier 1.5: Laver, Gonzales, Sampras, Nadal, Borg;
Tier 2: Lendl, Connors, Rosewall, Tilden; Tier 2.5: McEnroe, Agassi