I was just wondering that Kawaki is the one who fight with Naruto and don't even look a bit injured or exhausted this means that either he somehow was able to put Naruto in some other dimension or he really beat him .I mean this never happened since Kaguya's fight and if Kawaki has beat him then it's very clear that one who could beat Naruto rather than Sasuke is a big problem I mean no enemy has beat him before in a proper way (besides Sasuke) So it could be possible that Kawaki could turn out to be the strongest enemy in history of Naruto