I was in a Boxing tourney on Saturday and encountered two styles/bodytypes that gave me problems. I entered into the heavyweight division. I'm 6 feet 208 pounds. First match was against a 6'5+ 250lb+ opponent, he got me with a good jab at the beginning and a right cross in the middle of first round, every attempt to jab him seemed futile because he was much taller. I resorted to going hard to body and repeatedly going for the spleen and solar plexus. He started gassing from the body shots, and when he lowered himself to protect his body I was able to use left hooks and uppercuts. I won via TKO/KO in the third, but my jab was hardly used at all. Is this normal? Is it a waste of time trying to jab against a larger opponent? Second match was against a 5'10 250 pound power lifter built fighter, he cut off my angles to the left and the right, and swung overhand/looping hooks to the top of my head. I was protecting my head well with my gloves, didn't get hit in the chin or nose, but these hits hurt and i lost the fight due to tko. In sparring the peekaboo defence and circling had always worked to protect the deflect the energy. Even if a shot hit me on the top of my head, it didn't phase me... but this guy was strong, and now I know shots to the top of the head can do a lot of damage. I think slipping and ducking should be implemented a lot more if I fight this guy again because he timed my circling with overhand bombs and landed overtop of my gloves.