Master Yi mid makes Yasuo mid cry. Much more than any other counter. His shield just shatters off, and as he dances around minions, you keep spanking him with your sword, taking off chunks of HP, when he realizes that Master Yi counters the living fuck out of him at level 4, it will be too late.
Ok, same as Fiora lol
Having played this match-up myself, I am actually of the opinion that OP is correct. The thing is though, you have to play Yi well. If you don't know how to harass well with q+passive, or how to mitigate damage with your w (making sure that Yasuo has already used his charged q before hand), then you will get stomped. But if you know enough to take this into consideration, then you will be stronger than the opposing Yas. I wouldn't really call him a counter per-say, but I would say that a well-played Yi will beat a well-played Yasuo most of the time. (post-6 the damage difference is pretty absurd. Just gotta watch out for a charged q->ult) As a side note, the reason I've actually played this match-up is because of 3's. I would think that there are just plain better Ad Champs to take mid in a 5v5 scenario such as Talon or Zed.
