I was thinking about that. One of the things I do when deciding what the public is going to do is to read comments somewhere. [url]https://uk.eurosport.yahoo.com/tennis/livematch/380703.html[/url] is as good a place as any. There are many more "how is he going to play tomorrow?" comments than "the winner is unstoppable and will go all the way" comments.
I don't know who the next opponent is, but you have to think there will be no value with him if everyone thinks this way. If Isner wins, he may be +200 instead of +140, for example (depends on opponent, obviously). But is there value there? Do these guys develop blisters? Can you give them special socks?
Media coverage will be nutso after this, and cameras will follow the winner of this match around everywhere for the next 24 hours. If we can find out information about what happens to your feet after eight hours straight of tennis and whether that can be overcome via treatment, that will tell us whether we have an edge here.