Board Thread:Versus Debates/@comment-26636534-20160221130323/@comment-12098592-20160423073258

My two cents

Guy needs at least the 6th gate to one shot Itachi. You do not open the gates in an instant as seen in the Lee v Gaara fight and Team Guy against Kisame's "clone", it takes time. Given the Sharingan's ability to anticipate and predict, he would recognize to some degree when Guy would be attempting to go for it.

Guy has developed a strategy to fight the sharingan yes. I will not go into what ifs Itachi can find a way to force eye contact etc. While I am certain that he could find a way to force eye contact and place a genjutsu, that is the least of Gai's concerns. Would also like to add, just because you know how to break a genjutsu does not mean you can break any. Also while dealing with one you are pretty much vulnerable unless you're fast enough to deal with it before caster attacks as seen with Kurenai and Orochimaru.

Avoiding eye contact and focusing on his feet would give him a tough time to follow Itachi's movement especially considering that even proficient Sharingan wielders have trouble following them all. More importantly it would also leave him exposed to many dojutsus but the most notable ones are Yasaka Magatama, Amaterasu and Totsuka tsurugi (while Susano'o awakening has been somewhat inconsistent we have seen full Susano'o brought out in an instant / mere seconds several times) Without looking in his eyes, he would have no idea know if they were coming or not. Factor in Itachi's genjutsu range, Guy can ill afford to get complacent regardless of distance.

Itachi likes to use bukijutsu and his crows summons as diversions and set-up chain attacks. Guy with limited field of view would have trouble keeping up with these distractions while also tracking Itachi( especially kage bunshins). Bunshin feints combined with his fast handseals execution and jutsu speed, he could also switch with one and keep observing from a distance or just surprise him like with Kakashi in part 1 or Sasuke in their final confrontation. His skills with projectiles, means they could pretty much come from out of nowhere (i.e when he grasped the rinnegan's shared vision idea and blinded Nagato's "summons" with just kunais).

Without the fight beginning with Guy already in eight gates mode, I don't see him winning.