you can never say for sure wat would happen in any fight wat u can do is compare.

looking at the two fighters on paper pavlik has the upper edge because of percentages knockout wise, although calzaghe has the experience and in my opinion has had the harder fight in mikkel kessler.

Looking at the fighters in the ring i,ve always said that i think kelly pavlik is a wild uncontrolled version of kessler , but thats what works for him but lets be honest jermain taylor was waiting to be taken he cant keep himself in the centre of the ring he sometimes seems to forget he's inside a boxing ring.

As for joe calzaghe he has had some easy fights and some scrappy fights aginst scrappy fighters but the better the fighter the better joe fights. Joe calzaghe vs jeff lacy in my opinion that was one of the greatest boxing displays in the last couple of decades, maybe jeff lacy wasnt in joe league but he was a good fighter just look at his knockout record pre calzaghe. and again with mikkel kessler i personally think kessler will never lose again and now bernard hopkins great knockdown by him in the first round a won the next two aswell but from then on joe controoled bernard was still walking looking ok with a couple of nright hands but joe was stalking and landing more punches land nice jabs stepping in and out avoiding bernards counters.

I think it would be a matter of hand speed a footwork if joe and kelly met in the ring kelly is a banger but how affective is any fighter standing infront of joe throwing joe would be in and out kelly right hand is affective but joe had tougher i also think on the inside joe will come out on top becuse of his ability to change and shorten up his punche s not adding power just keeping speed and showing to much leather for pavlik to deal with.