ONE Championship is the largest martial arts organization in the world today. This is primarily because starting this year, they have been regularly showcasing MMA, Muay Thai, kickboxing, and submission grappling in their events. No other organization has had such a holistic approach to combat sports entertainment. Fighters of all disciplines can showcase their talents to cater to fans of all kinds. View this post on Instagram Instagram PostOne of the budding parts of ONE Championship's roster is their pool of talented submission grapplers. Starting as an experiment back in 2018, ONE submission grappling has since grown into a major mover in the organization.As of this writing, ONE has legends like Andre Galvao, Garry Tonon, Marcus 'Buchecha' Almeida, and Michelle Nicolini in their ranks. They also signed new-age legends like the Ruotolo brothers, Mikey Musumeci, Danielle Kelly, and Cleber Sousa.The grappling leg has gone so big that ONE is minting a new submission grappling world title to be contested for at ONE on Prime Video 2 tomorrow. View this post on Instagram Instagram PostAn exciting trend that is becoming apparent in ONE Championship submission grappling is a budding rivalry between two martial arts: Brazilian jiu-jitsu and sambo. BJJ and sambo have had a long history together, being two of the major martial arts practiced in MMA today.BJJ is a grappling-based martial art that focuses on ground fighting. Jiu-jitsu emphasizes technique and leverage over size and power, allowing smaller fighters to subdue and submit larger and stronger assailants. On the other hand, Sambo is a hard-hitting Russian military system that employs striking, grappling, and ground fighting. Sambo focuses on powerful throws and swift submissions. View this post on Instagram Instagram PostBJJ and sambo have had most of their tussles in MMA, where the jiu-jitsu-based fighters were pitted against combat sambo champions. The most famous match-ups were Fedor Emelianenko vs. Antonio Rodrigo Nogueira in 2004 and the upcoming UFC bout between Islam Makhachev and Charles Oliveira.This rivalry hasn't reared its head a lot in submission grappling. However, that might soon change. ONE Championship has had a few match-ups between sambo and BJJ in their submission grappling matches, and they're all quite entertaining.Rodrigo Marello scores the fastest win in ONE Championship submission grappling historyThe most recent entry in this rivalry happened just last night at ONE 161 when Brazil's Rodrigo 'Diguinho' Marello submitted sambo specialist Ruslan Bagdasarian in just 15 seconds. It was the fastest win in ONE Championship submission grappling history. It might even be one of the fastest the sport has ever seen.Marello showed that jiu-jitsu is constantly evolving, and he's living proof of it. Sambo specialists are best known for their leglock games, but Bagdasarian seemed clueless at what Marello did to him. View this post on Instagram Instagram Post'Diguinho' immediately sat down and went into a Dela Riva guard - a guard position mainly used to sweep - and used it to clamp a straight ankle lock.Marello surprised Bagdasarian by attempting an ankle lock from a Dela Riva guard, as no one really attempts it from that position. The Brazilian's long legs and frame helped him angle his body to make the unusual footlock possible from an otherwise neutral position.