You have to take into account sweat as well. A boxer's face is probably going to be sweaty as they exert themselves quite a bit during a fight. As a result, the

You have to take into account sweat as well. A boxer's face is probably going to be sweaty as they exert themselves quite a bit during a fight. As a result, the blood is going to get watered down. I tried to find pictures to verify my idea, but every head injury picture I found was of an athlete.