I watched the entire match yesterday, was struck with how easily Isner moves around the court, always seems to be in position without having to scramble. First set it seemed that he was playing well within himself, not forcing any shots, hitting good pace without trying to hit clean winners. As the match wore on, he started hitting out more, made a few more unforced errors. Federer just picked him apart with placement, combined with his usual pace and spin --- deadly combination.
Have to admire Fed for how he has risen to the challenges to his supremacy, elevated his game. What a champion! Hopefully Isner is now in that elite company for good.
Re his racket, noticed the comment about the comfy feel resulting from the wider string spacing. That's another reason I like the Vortex rackets, they feel so EZ on the arm/shoulder.