Itachi is badass nobody really has a chance against him sasuke will never EVER be on his level.

gai really has no chance im sorry but anyone can tell this.

(notice gai says anbu is coming to help) since he knows he going to get beaten the crap out of and probably is bluffing saying ANBU is coming just to try to scare itachi

so what gai can look at his feet... Itachi can use sharingan to copy his jutsu easily and he can see whats going on while gai can't really