Naruto vs. Sasuke!! (volume)

is volume 20 of the Naruto manga.

Chapters

 * 172.
 * 173.
 * 174.
 * 175.
 * 176.
 * 177.
 * 178.
 * 179.
 * 180.

Synopsis
Upon returning, Tsunade tends to a number of injuries that have yet to be fully healed. Rock Lee, his injuries from his fight with Gaara too severe to be healed by regular medics, proves her most difficult case. After inspecting the damage to his body Tsunade advises that he give up his life as a ninja, though Lee insists taking the operation. Meanwhile, Sasuke, angry with himself for being so easily defeated by Itachi and at the same time jealous of Naruto for being able to surpass him as a ninja, he begins to search earnestly for ways to get stronger. In doing so he forces Naruto to fight him, though his spirits are only dampened further when Naruto's Rasengan proves stronger than his Chidori. To draw Sasuke further down the path of vengeance, Orochimaru sends his Sound Four to confront Sasuke and show him the strength that can be gained by joining them.