OKTAGON 66 is set to Saturday mark the launch of the promotion’s $1 million Tipsport Gamechanger tournament in Dusseldorf, Germany. The exact amount is actually 1 million euros, equating to $1.047 million, with $300,000 going to the winner. Sixteen middleweights will enter, but only one will leave with that bag. The 16 participants include UFC veterans David Zawada , Krzysztof Jotko , and Andreas Michailidis