The only weaknesses I've seen are that he sometimes raises his chin slightly when punching (not really when he throws the leaping lead left hook but more often when he jabs), sometimes telegraphs his lead straight right by re-positioning his rear foot towards his opponent (somewhat resembling a sprinter in starting position) and when leaning back to avoid head punches he sometimes raises his chin significantly without having his right glove in a position to block a left hook to the head. I'm a big Pacquiao fan but I can't see him beating Mayweather. The only punch I can see him landing is when Mayweather telegraphs his lead right and Pacquiao moves his head side to side then throws his own straight left while leaning to Mayweather's left and then turning him (the same move he landed on De la Hoya seemingly at will). Yeh I know Oscar was dehydrated. Please no "gangstah" Mayweather this and that shit I wanna learn about boxing not about your admiration for your favourite boxer. Thanks.