The Battle Begins: Naruto vs. Sasuke

is episode 107 of the original Naruto anime.

Synopsis
Due to the injuries he received in the Land of Tea, Sasuke is stuck in the hospital recovering. Angry that Naruto has continued to get stronger while he is still not strong enough to defeat Itachi, he challenges Naruto to a fight when he and Sakura come to visit. Naruto accepts, and the two head to the roof. After exchanging attacks, Naruto creates a Rasengan and Sasuke prepares his Chidori. The two rush towards each other, with Sakura screaming for them to stop.