Has no one considered the possibility that it is a clone of Naruto? I mean, after all, Sasuke is extraordinarily tired.
It wouldn't be impossible for him to be too tired to consider that the Naruto he is about to kill is a clone, and that the
real Naruto is going to jump out of the ground and punch him in the face.
OT: Eh. Naruto had all of the senjutsu gathered by Kurama. In other words, think about how much senjutsu had boosted
normal Naruto. Yeah, he went from decent shinobi to the great hero of the village during the Pain Arc. So if Kurama had its chakra
boosted... it'd be Juubi level or near juubi level, at least temporarily. So it makes sense for both Naruto and Sasuke to tie.