Board Thread:Versus Debates/@comment-5936871-20160126112547/@comment-1872728-20160128103723

Itachi could win if genjutsu is effective against Rinnegan. Even if Nagato is way up high, or that the Preta Path is able to absorb genjutsu, Itachi can cast a genjutsu to one of his summonings, and since they all have linked vision, Nagato will also be affected by the genjutsu. If that's how it works.