I have been wondering the same thing. I also can't fathom why the Klitschko's have been trying to build a time machine so they could fight Willie Pep. Rumor is there trying to get the fight set up for a couple years after Pep was retired.
I was thinking that is more than likely the outcome of a fight with either brother. Cuz Wladimir can't take a punch and Vitali is a quitter, so I agree with you both fall from the first punch.