How come Mayweather never fought Kostya Tsysu

[blegit]

Well, there are a lot of dream matches that would have been made but fighters ruin other fighters looming matches. Then you have HBO, Showtime, promoters, etc who have personal interest that often bring about problems which have stopped fights from happening. PBF did want to fight KT and it would've went into tight negotiations after a Hatton win. PBF voiced wanting KT many times and he even said some time after the Hatton fight that he would still fight KT but as we all know after Hatton KT just rode off into the sunset. And deservingly so, Tszyu was without a doubt the dominate champion at 140 for enough time to be secure in his legacy. There is life after boxing and Tsyzu is one of the few fighters to realize this and come to grips with it.

[THE THIRD MAN]

It was going to happen if KT got past Hatton, I think at 36 yrs Mayweather would have won.
However, the Tszyu of 1999-2001 is a different story and i think he would have nailed Mayweather at some point, Mayweather was tailor made for him.
It would have taken all of Floyd's defensive skills to avoid getting knocked out, in doing that would he have done enough to win a decision?
I notice that Mayweather never disses Tszyu at this time, afraid of the repercussions Floyd?