Kaynan Duarte is a Brazilian jiu-jitsu black belt under André Galvão, having also worked extensively with coaches José Luis and Paulo Ledesma, being one of the main competitors of the Atos Jiu-Jitsu Academy during the late 2010s and early 2020s. Duarte first made an appearance on BJJ's mainstream media after his win at the 2017 ADCC Rio de Janeiro trials, an outstanding achievement conquered as a purple belt. He went on to cement his status as one of his generation's top competitors in the years that followed with multiple world titles with the IBJJF and the ADCC.