Why didn't Sasuke put Naruto or his Kurama in genjutsu during Naruto vs Sasuke? It only makes sense, he could have won easily that way if Obito can put a Jinchuriki (Yagura) under a Genjutsu, then why can't Sasuke? His eyes clearly surpass Obito's.

Why didn't Sasuke put Naruto or his Kurama in genjutsu during their battle?
To break out of a genjutsu you can disrupt your chakra flow. Although Sasuke's genjutsu is very strong, Naruto and the kyuubi are fully compatible, so the kyuubi can easily break Naruto out of a genjutsu if Sasuke tries to subjugate him.