Confident Manny Pacquiao tells crowd, 'I know I'm going to win the fight'

Saturday's fight between Manny Pacquiao and Floyd Mayweather is a long-(loooooooooooong-)awaited matchup of two icons widely regarded as the best pound-for-pound fighters in the world, but it's also a fascinating study in contrasts. Mayweather is cautious in the ring, but exceptionally brash out of it. Pacquiao subjects opponents to an unending barrage of punches, but otherwise he comes off as quiet and humble.