but still not enough to call him a sensor, just really aware of things... I believe kakuzu called it sensing presences , he was amazed that kakashi snuck up behind him and was able to hide his , itachi was able to tell that sasuke was behind him, when they were younger he knew he was hiding behind the door, He seems to be have a keen sense in these things , but still not enough , I also said that hiruzen sends a clone or something, just to make sure he doesnt get it, a clone is more than enough to finish a blind itachi..
70% Blind itachi was operating horribly, couldnt dodge things etc.. fully blind itachi would get his shit fked up
And i was just follow shishui's rules, he said give hiruzen all the jutsu's of konoha except hiden and not kkg, just like his hype states, and make 1 situation where he wins
While he may not have it, it is a possibility , he seemed to have seen it before, he knew that he couldnt just break it by disruption of chakra, and waited for the moment to strike the caster,
With his title professor, and his nack for learning jutsu, it possible