Originally posted on 06/27/2014:

people counting on tiebreaks need to remember that isner wont be breaking back easily in this match. so its very possible he loses serve early in a set and then takes the rest of the set off, which means the possibility of double breaks. when big john becomes disenchanted, he starts to get all mopey and hang-dog. players are very incentivized to win the match, somewhat incentivized to win sets, not very incetivized to win games in sets that are out of reach.