Thread:Dim1/@comment-67.60.221.105-20180826090521/@comment-3551173-20180828135712

We can go back and forth between whether Kirito is the OP undefeatable hero, or Yuuki is the Mcguffin if you like but end of the day, decisive fact Kirito lost to Yuuki twice. Meaning the official record is Yuuki is stronger than Kirito in game dueling.

If  you really want to peruse the full debate I refer you to this thread:

Kirito vs Yuuki