Mayweather Vs. Tyson: The Fight That Never Happened?

1) tyson vs toney at hw. Back when toney was trained by freddie roach, and tyson was fighting mamouth sized huge heavyweights. Instead of putting heavy work on mike,. Just fights that were there to be made but never happened due to boxing politics or a fighter not wanting it. Fights that did happen, but years too late also acceptable.

If you could go back in time and make one fight happen that never did, what would it be? A prime mayweather vs. Lets discuss the greatest "what if.