Daniel Aquino Diniz Coelho Santos, commonly known as Daniel Diniz, is a professional grappler and a jiu-jitsu black belt under Lucas Leite, who also worked extensively with other coaches such as Leonardo Vieira, Pedro Franzosi, Diego, and Tiago Pereira. Daniel Diniz first made waves in the sport as a colored belt, taking medals in the International Brazilian Jiu-Jitsu Federation (IBJJF) South American and Pan American Championships, later cementing his status as a black belt.