I don't write Federer off tomorrow at all.
Neither do I. Even if Feds is not quite there yet, his playing was much better today than in his former matches - less shanks and nettings at least.
Of course, very hard to draw any conclusion from this match, as Hewitt was obviously struggling with his knee condition, hence his very poor movement. He was a sitting duck most of the time, really.
As for the match tomorrow, I wouldn't at all mind the 'First Set Against Benneteau-version' of Murray appearing there. In that case, Feds might well have a chance, still. Not counting on that to happen, though.
and get back fully fit for the USO, Hewitt!