Board Thread:Theories and Speculation/@comment-26358288-20150630121218/@comment-3965545-20150630212849

Black Zetsu DID say he wasn't fighting at his best all around. He was sick and near death too. I'm positive if Itachi wanted to actually kill Sasuke there, he would not have got out of Tsukuyomi, and he would of then had his eyes plucked and then incinerated to ash.