During the fight Kakashi had to use his Sharingan, but he was only fighting two people, a chounin, and a genin. Yes both were strong but in some episodes Kakashi handels people, just as strong as Naruto, and lots of them at once. I think that Naruto has grown stronger than Kakashi and that even if alone he could have defeated Kakashi without Sakura. I think that if you take away Kakashi's Sharingan and if he had a real eye, Naruto would have surpassed him. Without his Sharingan Kakashi is only about a fifth as strong as with it... thats my opinion.