Both. I can't separate the two. You have to have boxing skills to make a K.O. Ali; Leonard; Duran; Hearns; Hagler; Salvador Sanchez; PBF; De La Hoya etc etc. etc. But if you're refferring to boxing skills like that of Calderon, Spinks, or Joan Guzman . . . **** it . . . I'll stick with the K.O. :yep :rofl