Matias Estévez is an Argentinian grappler and a jiu-jitsu black belt under Eduardo Duarte (Dudu) of Nova União Argentina. Despite competing mostly at a national level, Estévez made waves in 2022 as he joined the global circuit of the International Brazilian Jiu-Jitsu Federation (IBJJF) - after an absence from competition due to the COVID-19 pandemic - where he beat some of the world's toughest competitors while earning gold medals in important tournaments in the United States.