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Jakub Niski
Nationality Poland
Age 35
Brown belt in Jiu-Jitsu
Achieved
2021
Promoted by Roger Gracie
Brown belt
Achieved
2021, June 10th
Promoted by Roger Gracie
Purple belt
Competed as purple belt on Abu Dhabi Jiu Jitsu Pro
Blue belt
Achieved
2016
Promoted by Roger Gracie
Competed as blue belt on Abu Dhabi Jiu Jitsu Pro
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