What episode does Sasuke fight Itachi in?

85 and 86 and 87

Added by mannaked : 83,84,85 is where hidan and kakuzu vs the newly formed team kakashi. Members : Kakashi, shikamaru, ino yamanaka, choji

Wrong its 84 - 86

it was episode 137 when the fight started and ended at episode 138 but was explained in episodes 135 and 136 (in Naruto Shippuden)