Marco Ruas in the context of "Renato Sobral"

Luta Livre (Portuguese: [ˈlutɐ ˈlivɾi], lit. freestyle fighting or wrestling), known in Brazil as Luta Livre Brasileira (lit. Brazilian freestyle fighting) or Luta Livre Submission, and also Brazilian Submission Wrestling, is a Brazilian martial arts and combat sport created by Euclydes Hatem in Rio de Janeiro. Primarily a mixture of catch wrestling and kosen judo, there is also ground striking with the hands, feet, knees and elbows. Notable practitioners include Marco Ruas, Ebenezer Fontes Braga, Johil de Oliveira, Alexandre Franca Nogueira, Renato Sobral, Gesias Cavalcante, Pedro Rizzo, Darren Till and José Aldo.

There are two styles: esportiva ("sporting") and combate ("ground strikes"); both styles are no-gi. In esportiva competitions, grappling techniques are the only techniques allowed to subdue the opponent. Another style developed later is called "Luta Livre Vale Tudo", which is similar to the modern MMA style which allows both standing and ground strikes and submissions. Consequently, it is important to calmly strategize and execute moves with the aim to force the opponent to submit via armlock, leglock, choke or necklock, or to win by points (i.e. takedowns, domination position). Punches, kicks and other "hard" techniques are not allowed as this is considered more a sport than actual combat. Combate, on the other hand, includes striking techniques on the ground; palm strikes and kicks are allowed, but the ground fight and submissions are still the largest elements. This is also the form used in MMA-style fights.

Vale Tudo or vale-tudo (Portuguese pronunciation: [ˈvali ˈtudu]; English: Everything Goes/Everything Allowed), also known as No Holds Barred (NHB) in the United States, is an unarmed, full-contact fighting style or competition format characterized by having very few rules. It became popular in Brazil during the 20th century and would eventually evolve into modern mixed martial arts (MMA). For years, "Vale Tudo" was used as a synonym for MMA in Brazil, but the term fell into disuse due to the emergence of stricter rules and the influence of the media to have a more "civilized" name. It is now used to refer to an early, more rules-free stage of the modern sport.

Vale Tudo initially started as an informal ruleset for fighters from different martial arts to fight each other. The Gracie family was known to organize their famous "Gracie Challenge", in which they would fight other martial artists in Vale Tudo bouts to prove the efficiency and superiority of their own Gracie jiu-jitsu. Many fighters eventually started to train specifically for Vale Tudo events, mixing striking and grappling, eventually advertising "Vale Tudo" as its own standalone style. For example, Marco Ruas referred to his hybrid style of Luta Livre and Muay Thai striking simply as "Vale Tudo".

Johil de Oliveira (born August 7, 1969) is a Brazilian former professional mixed martial arts veteran fighter, Luta Livre practitioner who has competed in Japan's Pride Fighting Championships and Brazilian-based organizations such as World Vale Tudo Championship (WVC), IVC, Jungle Fight, UVF, BVF, Bitetti Combat and International ones such as Shooto and Cage Rage. Nicknamed "Samurai do Fogo" (Portuguese for "Fire Samurai"), he has been one of the major supporters of Luta Livre in Brazil and Worldwide, alongside Marco Ruas, Alexandre Franca Nogueira and Hugo Duarte (pt).