Nadal had always been the guy to truly trouble Fed. Djoker proved though he could really put the hurting on Fed in Australia and other slow courts.. While Faster hard courts, its more even.
I would like to see a few Nadal-Fed matches at the USO to see how that goes there.. But my suspicion has always been Nadal would take Fed out there more times then not
Murray.. Not even part of the equation.. He can't do anything to Fed at slams.