Naruto and Sasuke have one of the most epic duels of the series. Both best friends who eventually ended up bitter enemies are having a final duel that concludes the child hood series (Naruto) and brings them closer to the current Shippuden series that takes place 2.5 years later.
Besides this fight scene being great, Naruto and Sasuke both push each other to the limit. Sasuke is the reason for Naruto leaking his seal twice, especially in this fight scene when Naruto goes 2 tails. And Naruto is the reason that Sasuke wanted to get better and to achieve more power by submitting to Orochimaru’s training which also got him the ‘Cursed Seal’.
None the less, this fight scene signaled that these two will eventually have one last fight to end this conflict, even if one person has to die in the process.