Board Thread:Versus Debates/@comment-26636534-20180830184727/@comment-26107879-20180925200250

Chapter 142 only shows him saying Itachi is a true predecessor of the Sharingan. Also on page 15 of that very chapter, Kakashi literally states "Only another person with Sharingan could probably fight with his" referring to Itachi's Mangekyo after he freaked out and told everyone to close their eyes. So I was right, you were wrong. He assumed he would be fine, and was only worried about Asuma and Kurenai. Check Mate.