In the Last chapter we saw itachi preparing to do "ameterasu", In the beginning of this chapter itachi tried to kill sasuke with this ameterasu but sasuke use a big shuriken, itachi dodged it at first but then there was a string tied on the big shuriken. The shuriken wounded up itachi, Sasuke being able to stop itachi performing Amatarasu tried to gain advantage by burning itachi with Katon. Itachi quickly dodged an went to a corner. As the battle became worst, both uchiha brothers used katon on each other at the same time. The katon that itachi use was just a distraction for him to do Ametarasu.