Maccbull_BigBullyBooaza wrote:You can't attack the knee like that in most MMA rule sets. You can strike the lower leg or the thigh with the shin, knee or top of the foot but not with the sole of the foot in that position.
Which competition rulesets say you can't? Cos you can in unified rules, which the ufc uses, see Jon Jones doing oblique kicks to people's knees for the first half of the last decade.