User blog comment:AtheistUntoDeath/Which of these Champions would win? Part 5/@comment-24036535-20140530014154

Both are the only practicer of their art, Riven is only speculated to use Wind Techniques, and Wukong is only a student of Wuju, both are considered sacred and very powerful methods of fighting. If we look at in game abilities, Yi would have the advantage with his Alpha Strike and Meditate, making him a better dueliest than Yasuo, however, out of game...

The match would be very close, Yasuo's sword is longer than Yi's, giving him a distinct advantage there, and his style of sword fighting is considered legendary. Yi on the other hand, learned a martial art, not sword style, meaning his entire body is tempered, as well as spending years alone to master Wuju, while Yasuo spent his on the run, making Yi a far more experiance fighter, and far better in the event he lost his sword. If Yasuo lost his blade, he would almost certainly lose the battle.

Let's look at morale now, why would this fight occur? Yi is probably hunting Yasuo, who is fleeing from Ionia, meaning his purpose is that of serving his nation, and excecuting a fugitive. Yasuo has the drive to survive, and not only that, survive to exact revenge on the true assassin of the elder.

In summary:

Yasuo has a slightly superior sword, to Yi, as well as more conviction, so in that sense he would win.

However, Yi has years more fighting experiance over Yasuo, having spent years in reclusion, and mastered Wuju, as well as nothing being purely reliable on his weapon.

I can't find a side to choose.