User blog comment:AtheistUntoDeath/Which of these Champions would win? Part 5/@comment-5975474-20140531034700

As far as I can tell, I assume Yi will win.

Yi is the master of mind and body, which means he has fully control over them. Hardened through training and experience, Yi has learn how to control his body and, after Noxus - Ionia war, Yi has learn how to control his mind by discarding his hatred towards those who destroyed his homeland. As he once said, "The edge of the sharpest blade is no match for the calm of the peaceful mind", Yi's mind and body are one. He could strike enemies by using his mind only.

Yasuo, on the other hands, he cannot master his mind. His body and his sword technique are legendary among Ionian warrior, but he failed to let out his mind - his mind is now about the death of his beloved brother Yone, the revenge upon who has put the miseries on him. Objectively, he cannot do so because of his status as a fugitive. But that's his drawback. Yasuo's blade maybe sharp and strong, but will it be a match for Yi's calm and tempered mind?