Disclaimer: Naruto is not mine.
It took Itachi four days to realize that there was more than one use for a jinchuuriki.
Naruto's last fight had been his fiercest without a doubt. He had scratched and kicked; clawed and bit. In the end, however, Itachi had won although he never tasted victory. He bandaged his eye and drugged Naruto before returning to the Akatsuki.
They had to wait until Kisame returned to start the extraction jutsu. In those four days, Itachi realized that there was more than one use for a jinchuuriki--and more than one way to make Naruto pay for taking his eye.
