I had a lad try and do the same thing to me, my arms where all black and blue the next day, but coming into the third round he could barely keep his gloves up, just countered so he didn't over shoot me to much on points and basically just teed off on him in the last round.

I'm pretty fit but it'd have to be a long pro fight or you'd have to be in with some one with weak arms and shit conditioning for it to be really affective with amatuer scoring