In order for Sasuke to want to fight Naruto, he would have to remember what Itachi did to him. And I doubt he'd suddenly wake up one morning and go "That bastard Naruto, grr." It would have to be after something traumatizing in order for it to really fit into how bad Sasuke becomes.

Hm........ Maybe over Sakura. Ooh. That's a good way to lead into this.

And I wish Sakura cut apples for me. ;_; [in her bath towel]