Like a half to a whole day.
So Naruto struggled for that long to tie with Sasuke
Like.... 5 minutes? Unless you're counting the travel time or the time they spent unconscious.

They fought morning to dusk/night. Naruto struggled because they're on par.
So Naruto fought to match for that long to allow Sasuke to live.
On par yet sasuke admitted he can't beat Kurama then Naruto without 8.5 bijuu. Lol
True.
Lol sasuke had yang kurama and still tied. This does nothing to disprove my point.
lol I laugh every time I see the 8.5 argument because at the end of the day, Sasuke wouldn't need it if Naruto was alone.
Didnt Naruto beat sasuke in taijutsu so bad he forced sasuke into blowing their arms off? Could've sworn kurama had no impact on the taijutsu. Lol
So fatigue is your argument ? lmao. K I'll admit, Kurama was one heck of a rival to tire him out enough for naruto to tie with .
Sasuke didn't admit anything :lol You haters forget that he converted the Bijuu chakra into Raiton. Unlike Sasuke, Naruto had Kurama help throughout the fight. Kurama was coaching and building chakra. Sasuke had no one in his corner.