The itachi fight you're talking about was WAY before Naruto and the Fox formed an alliance. It's said in the manga that only a perfect jinchuuriki can break free from Genjutsu, like Bee does.not sure a simple thing like that would help you break free from a STRONG genjutsu. remember that time naruto and kakashi fought itachi. naruto wasnt able to break free himself. so as i mentioned earlier, it would have to be an outside source.