Board Thread:Versus Debates/@comment-28885945-20160706220950/@comment-734582-20160707104059

They've known each other for so long, that i do not believe either has a significant advantage over the other.

Guy has no clear methods of detection, making Kakashi's hiding and silent killing techniques essential for avoiding Guy's attacks. That, coupled with Sharingan will prevent Guy from easily hitting Kakashi.

Similarly though, Guy is primarily a Taijutsu user and has nothing Kakashi can copy, and his significant speed will make it difficult for Kakashi to hit Guy.

So:
 * neither has a significant chance of hitting the other
 * they have excellent knowledge of each other's abilities and tactics, preventing any Cheese strategy
 * they both have similar levels of power restricted by time. Kakashi's more specialistic with assassination while Guy's a bit more generic with raw power. We've seen similar set-ups (Madara vs Hashirama, Sasuke vs Naruto) result in ties.

In conclusion, a tie is highly likely and odds are close to 50/50, whoever makes the first mistake loses.