Sasuke LOST THE FIGHT. If Naruto had INTENT TO KILL, he would've succeeded in killing Sauce. But since Naruto held back to a certain degree, that holding back is what kept him on level with Sasuke through the fight.
Think of it this way, though they have rules to avoid lethal strikes/death, when MMA fighters they fight WITH intent to subdue until Ref's end the fight (or in otherwords, KILL.) Disregard morale compass, if referees weren't present to stop fights and enforce rules, the majority of the fighters who lost would be on their death beds.
Now imagine a fight with no Ref's to intervene. (Naruto Vs Sasuke)
Imagine if a fighter who decided not to follow the rules, going for lethal strikes and no Morale compass to stop after the pennant is conscienceless. Main goal is victory through death. No holds barred. (Sasuke)
VS
Imagine a fighter who knowingly enters this fight, with no intent to kill, still following fighting rules, avoiding lethal strikes ext, even without the ref present. Main goal is victory through normal means, aka not killing, following normal MMA fight procedure. This substantially puts this fighter at a FAR GREATER DISADVANTAGE. (Naruto)
Naruto still came out on top, while still holding back his killing potential.
They may have technically been unable to move and unable to fight in the end, but since Naruto was at a greater disadvantage and yet still pulled out a draw...
Naruto won