Board Thread:Versus Debates/@comment-24855929-20150705215528/@comment-25319479-20150706184016

The only dangerous thing about Shisui is Kotoamatsukami. All Kakashi has to do is use a shadow clone and trick Shisui into wasting it on the clone.

If Kakashi could keep up with version 2 Jinchūriki's, then he could keep up with Shisui's Body Flicker Technique. Shisui is also skilled at genjutsu, but so was Obito who's genjutsu could control Yagura aka a perfect jinchūriki and Kakashi was capable of seeing through his genjutsu, so that's not an issue against Kakashi.

Shisui being the strongest Uchiha isn't much of a title seeing as the clan was so weak they were killed by only 2 shinobi. And since Kakashi beat Obito, i'd imagine he would do the same to Shisui.