"Sai and Sasuke!!" (サイとサスケ!!, Sai to Sasuke!!) is chapter 301 of the original Naruto manga.
Sasuke has no interest in Sai, who tries to open a dialogue by suggesting he will get along with Sasuke better than he did with Naruto. The latter overpowers Sai with fear, but continues, explaining that Naruto has not stopped looking for him since he thinks of Sasuke as a brother. Sasuke says the only brother he has he wants to kill. Team 7 arrives outside the base and prepares to break in.