Did he fight Guy in 8 gates?:| Itachi not only kept up but he also saved 2 perfect jins. Kakashi fought Itachi in part one and 2he was fighting guy too. Itachi was fighting Bee who was not in tailed beast mode, and naruto in his first tailed beast mode. not the one with the full power of the kyuubi. also I do nor recall kakashi fighting itachi with be and naruto