Originally posted by: Zabuza No Jutsu
From what i saw in the anime (dont flame me for this it's just a thought) Gai did seem to have the counter-sharingan pretty much worked out, as he'd used it may times previously with Kakashi. Problem is, would even Gai's eyes be able to match Itachi's speed?
no. he didn't counter the actual sharingan itself, he countered gejutsus performed by sharingan. don't mix up the two, they are totally different.