Some good advice from the other posts regarding short fighters. I just wanted to say, that I always was very cautious when I had to fight a short man. In fact, they were dangerous, and you knew he was going to get in close and work on your body, trying to force you to bow and lower that head for an uppercut. That reach of a tall person requires hm to keep moving away, and if his foot work is sloppy, he will get off balance quickly. Use your size as a tactical advantage, not a weakness.