The Colosseum Tournament (COLOSSEUM) is a kickboxing, mixed martial arts (MMA) and boxing promotion company based in Romania, which is owned by Gabriel Georgescu. It is one of the largest kickboxing promotions in the country, and takes its name from colosseum.

Sebastian Cosmin Cozmâncă is a Romanian Muay Thai kickboxer who competes in the heavyweight division. He is currently signed to the Dynamite Fighting Show. He formerly competed in the Superkombat Fighting Championship and the Colosseum Tournament. He was Cătălin Moroșanu's teammate and training partner.