Australian BJJ icon Lachlan Giles is sharpening every submission in his arsenal in preparation for his match against the greatest competitor of all time.The 39-year-old grappling wizard will make his promotional debut against Brazilian jiu-jitsu legend Marcelo Garcia in lightweight submission grappling action at ONE Fight Night 38 this Friday, December 5.Giles, whose leg-lock mastery disrupted modern grappling, has arguably one of the best heel hooks in the game.He used his signature move to submit three heavyweights in the absolute division during his legendary run at the 2019 ADCC World Championship.However, Giles understands that he must bring his entire arsenal and be prepared for all situations against a fundamentally sound opponent like Garcia.The Absolute MMA affiliate shared in his pre-event interview with ONE Championship:"My entries are good, and I can attack the upper and lower body from guard, good toe holds, shotgun armbar. I've been working even triangle entries when someone's defending K-guard attacks into the legs." View this post on Instagram Instagram PostMeanwhile, Giles understands that a diversified offensive game will be key to countering Garcia’s technical perfection.Catch Giles vs. Garcia’s dream match at ONE Fight Night 38, live in U.S. primetime exclusively on Prime Video for North American viewers.Lachlan Giles says Marcelo Garcia is the BJJ GOATAs far as Lachlan Giles is concerned, there should be no debate on who is the greatest grappler of all time.For the Aussie innovator, that recognition belongs to his ONE Fight Night 38 opponent Marcelo Garcia."From a jiu-jitsu point of view, he's incredible. He's the best ever. I think you can call him the greatest of all time,” he told ONE Championship.'The Giant Killer' added:“You look at the people that Marcelo has beaten and how he's done it as well. His submission rate is very high. He's always been very innovative."