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You've certainly heard about the phenomenon that is OKTAGON Underground. A thrilling competition that overcame the coronavirus related lockdowns and strengthened the love that Czechs and Slovaks have for martial arts and has forever left its mark on the history of our organization. But in OKTAGON, you will come across the Underground rules from time to time. So what does it mean to fight according to the Underground rules? What makes this fight different from classic MMA and why do we keep coming back to these special rules?