For more than 12 hours, the 10 mats set up in the Casal Vistoso gymnasium, in Lisbon, Portugal, were packed with match after match.
People from all over the world came to compete.
People from many different origins who in regular life have many different occupations.
They are plumbers, airplane pilots, police officers, farmers, students, nurses, stock market specialists, etc.
For one day tough, they were all blue belts or purple belts.
Here are some of the great images we captured of them.
For the full results, go to ibjjf.com