I enjoyed watching the match without commentators telling me
what happened in 1940s when they played tennis.
I agree that he does not bend low. However, the back is not
affecting the serve. The serve looks good. I think he made a good
decision to stick with the old one. But, he will (and should) go back to new one
either after the USO (if getting into WTF seems manageable) or
after the WTF (otherwise).
Another thing I am amazed is that Roger got so many of
his challenges correctly. He is not known to do well in this
department.
Haas has played a lot after Wimby and hence I think Fed
can take care of him assuming he gets past Granollers.