Well, he upset Marat Safin in routine straights anyway. 6-4, 6-4. John Isner read the Russian's serve like large print. I don't know that I've ever seen him return so well. While he's inconsistent off the ground, when he connects, he connects. And MMT would probably find something to like about his volleys. For a giant, he hits a low half-volley quite well.
This match indicates why I think Isner could be good at Davis Cup in the future. He enjoys the big occasions. He eats up the atmosphere like a hungry man and it feeds his tennis well.
The first American into the final 16. At No. 147, the lowest-ranked player remaining in the draw.