Guilherme Mendes is a Brazilian jiu-jitsu black belt under Ramon Lemos as well as one of the main figures in the Atos Jiu-Jitsu team, being also one of the best “peso pluma” (64,00 kg / 141.5 lbs) competitors to have ever competed in the sport. As well as being the first Atos team member to achieve a gold medal at the International Brazilian Jiu-Jitsu Federation (IBJJF) World Championship (2009), Guilherme Mendes is also the co-founder of the Art of Jiu-Jitsu academy and the brother of another jiu-jitsu legend in Rafael Mendes.