We have to admit, this isn’t quite what we expected to see when researching how the top grapplers are training for ADCC. 

10th Planet black belt Geo Martinez hit the mats for a twisty-turny tangle with 15-year-old Grace Gundrum, nicknamed the ‘Silent Assassin’. 

Check out the roll below. 

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How to Watch the ADCC 2017 World Championships

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