Sergio Calderon Gonzales is a Spanish grappler and a Brazilian Jiu-Jitsu black belt under Yan Cabral, founder of the Cerdanyola Fight Club (CFC Team), one of Spain's prime academies in the Catalonia region. One of the first Spaniards to compete at a high level in the sport's international circuit, Sergio is well known for his medals in important tournaments of the International Brazilian Jiu-Jitsu Federation (IBJJF).