So i managed to rewatch the mayweather vs mosley fight and here are some of my observations. I said before the fight that this fight would be one i expected mayweather to win handidly, but a few questions would be answered about PBF. The following questions in particular were the ones i was looking to be answered and they were indeed answered. -How good is the chin of PBF? I think we can safely say that mayweather's chin can hold up to single heavy and power shots. However we can also reasonably say that his chin is not Granite and he can most definately be hurt by a heavy handed fighter. PBF's instincts and heart are definately Great though. I believe also that Manny's chin is better than mayweather's. I conclude this from watching both pacquiao's fights with cotto and clottey again. Clottey would land 3 huge uppercuts bang on the chin of pacquiao rocking his head back and forth and manny would come back immediately with a huge flurry. Against cotto he took a few monster left hooks to the head but just shrugged them off. Mayweather gets hit nowhere near as much and the times ive seen him hit clean at WW he holds on, manny does not for any prolonged period. -How hard does mayweather punch at WW? I'd say very good power at WW. Mosley is known for having that famous granite chin having been tested with huge punchers throughout his career. My reasoning is that, if mayweather can make mosley think twice he can do the same with pacquiao. Its more impressive because mayweather does not throw combinations much and stil manages to get the opponents respect. Pacquiao will have to fight a more controlled fight against mayweather to avoid being picked off. Mayweather does not have 1 punch power but can get your respect. On the other hand, Pacquiao can hurt you badly with either hand at any time if he lands clean. -How fast is mayweather? Faster than pacquiao thats for sure. Mayweather is freakishly fast and is most definately faster than pacquiao. Ive said this before and will say it again, people need to watch a round or two of mayweather in slow motion to fully appreciate how fast the guy is. When mayweather says he can 'feel' when a punch is coming he really is telling the truth. Particularly in the reflexes and timing department mayweather is a street or two ahead of pacquiao. However because mayweather uses this reflex based approach he can be caught with quite solid shots if the opponent is very fast. But make no mistake mayweather is faster than pacquiao but i believe there is a possibility for pacquiao to overwhelm mayweathers reflexed based approach with feints and speed. -Is mayweather a real WW? The definative answer to this is yes. Mosley who is a strong WW was being pushed backwards and muscled on the inside, and this is the shane mosley who out muscled margarito on the inside. Mayweather is bigger than pacquiao but at this point i cant say who will be stronger, probably mayweather considering the size difference. With all the above considered mayweather pacquiao needs to happen even more than i though it did before. I now have mayweather winning a UD being a slight favourite due to being faster and having superior defence and timing, but pacquiao is the only one who can give this guy a real fight and vice versa. Pacquiao needs to train for speed and mayweather should train for power to put some hurt on.