Quite stupid actually by Tom saying he doesn't understand the tactics of Nibali and Quintana by letting Pozzo, Zakarin and Pinot get a couple of minutes and losing their potential podium place in that way.
Tom: Nairo and Vincenzo will do everything to make you nervous the coming days. If they are not able to do it by attacking and dropping you on the climbs, which is obvious atm, they will do it by getting as much riders as possible high up in GC. Then Tom will have to react in the coming days when someone like Pinot or Zakarin attacks from afar, otherwise there's the possibility they will grab the maglia rosa because of the lack of cooperation by the big three.
If Pinot attacks saturday in the valley between Grappa and the last climb, Nairo and Quintana can sit in Tom's wheel, hoping to wire him out, so they can profit from it and attack him at the right moment, when he's vulnerable and beyond his limit. Then they can break him and he can lose the Giro.
The more riders Tom has to keep in eye, the better it is for all his potential rivals.