The KO of Litzau should be a warning to Amir Khan, flashy style, fast, accurate and impressive punching that can dominate fights, but a severe flaw in their make up makes them vulnerable. Still, time for him to learn, and improve. The chin isn't really an issue IMO for Litzau, the problem was that he was taking clean right hands at a right angle to his line of sight, they'll knock anyone out when you don't see them coming, the neck is relaxed, and that makes the KO effect much more dramatic.