Imo Ko's only weakness is taking it too easy on women or other obviously inferior players.
I understand how it can be tough getting up for playing someone who is not suppose to beat you on your worst day but still, he has got to find a way to get up for a match like this because getting beat is a real possibility in pool if you take the game too lightly. The thing I believe Ko has to do is he has to find a way to make the match a challenge even when he is the heavy, heavy favorite.
They say Michael Jordan did this. He would find one little thing against one particular opponent to work on to challenge himself. Maybe it would be on defense: keeping his offensive player going left every single time. Maybe it was on offense: coming off a screen and shooting the millisecond he saw an opening. Whatever his strategy, we all know it kept him engaged and improving, even when he was the best player in the world. Imo Ko has got to do the same thing here. It really is a shame that he lost but what makes it worse is he lost to a girl. Go figure.