Sasuke and his Father (サスケと父, Sasuke to Chichi) is chapter 223 of the original Naruto manga.
Sasuke thought about that tension that had arisen between Itachi and Fugaku, wondering what could have ruined Itachi's standing amongst the Uchiha. However, from that point further, Fugaku became interested in Sasuke's development. After he taught Sasuke the Fire Release: Great Fireball Technique in less time than it had taken to teach Itachi, Fugaku said he was proud of Sasuke for the first time. He added that Sasuke should no longer try to follow in Itachi's footsteps. Sasuke nevertheless continued to idolise Itachi.