Not totally expected in the grand scheme of this
Fed just a few months shy of the age when Sampras
I think federer is headed that way with his game in
Only maintaining his position in this era because it is weak.
He is mantaining his position because he is still brilliant in many of his matches.
the ranks below 4 are weak, have been weak, and will look to be weak for some years to come allowing fed easy passage to the semis and quarters of slams for however long he wishes to continue his career...
otherwise, this is what happens in davis cup, especially when you repeatedly decline the chance to represent... isner had a friend in a davis cup spirit that does not enjoy being disrespected and that spirit has rightfully passed a heavy judgement upon federer here...