Not at all. I've long thought that Fed's back hints dropped late last year were pretty much BS. Reality is he's not great this part of the season and no US Open's in 10 years pretty much gives you the story from 30,000 feet.
This clearly was the humidity, so Fed fans can pretty much ignore this result and move along. Fed was never going to beat Novak on this surface. I DO look forward to his return in Asia because:
1. That surface is as fast as ever and unchanged over the last five years so we'll have New Fed vs Djoko on a favorite surface.
2. Paris, WTF, and Australia are all much faster for what should be the third year in 2018. New Fed should still have a nice advantage in these conditions.
In short handwringerers relax. And those eager for Fed's demise
may want to curb their enthusiasm. Big 3 are all doing well now so its going to be very competitive especially with the field rapidly filling up with players 25 and under that will challenge them (speed kills
).