I not disagreing with any of that really. If he knew he had a leg injuy he shouldn't have fought, not saying Vitali doesn't deserve the win.

It was no KO because of a punch though.

As for his other leg twitching, he was in pain people do twitch when they are in pain. Floyd Mayweather was knocked down when he broke his hand, he involuntarily collapsed onto the floor in pain. Was he hurt by a punch too, or his did his legs go becuase of the pain he was in? You tell me, his legs buckled no doubt, must have been hurt by a punch...

YouTube - Floyd Mayweather Jr. vs. Carlos Hernandez Pt.4