The Battle Begins: Naruto vs. Sasuke (オマエと戦いたい！ついに激突 サスケVSナルト, Omae to tatakaitai! Tsui ni gekitotsu Sasuke tai Naruto) is episode 107 of the original Naruto anime.
Due to the injuries he received in the Land of Tea, Sasuke is stuck in the hospital recovering. Meanwhile, Shikamaru gets promoted to a Chūnin by Tsunade. Tsunade starts the surgery on Rock Lee. Angry that Naruto has continued to get stronger while he is still not strong enough to defeat Itachi, Sasuke 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.