lol Fair play to the guy for not just winging punches and trying to KO her but something tells me she could have just slipped/evaded him until he got tired and then toyed with him standing if she wanted to.
I thought it was common knowledge by now that skill can outweigh size/strength to some extent. Size/strength is just an extra variable that goes into the equation.
Strong/big guy vs. smaller guy of equal skill crushes him every time. But small very skilled guy can compensate for a relative lack of strength/size to a certain extent. In this case, the guy wasn't big enough or strong enough to negate her skills, in fact her skills outweighed the size/strength difference by a significant margin.