Abu Dhabi [UAE], July 21 (ANI/WAM): The Abu Dhabi Grand Slam (ADGS) Jiu-Jitsu World Tour kicked off on Friday in Rio de Janeiro, with crowds flocking to see the competition. The three-day event is taking place at the Carioca Arena, featuring 2,000 male and female fighters from around the world, with strong competitors in the junior category. The ADGS Rio de Janeiro is the most competitive and the largest in terms of participant numbers compared to previous rounds, due to the popularity of Jiu-Jitsu in Brazil and the high number of practitioners. Headlining the first day of the event, the Youth…