Coming back rested doesn't mean much for health, no, but it does mean that he'll be more capable of being sharper deeper in tournaments, which is obviously the aim in any event and especially Grand Slams.
Kyle, yes he is slowing down, but Fed is still so good. There is a reason he is #2 in the world at his age. gosh, I hate this age thingy talk. I wish I was 20 and stupid again