This is a one-match rivalry, but it carries some weight given who was across the mat. Lachlan Giles and Marcelo Garcia have met once on record, at ONE FN 38 in 2023, and Giles took the win by submission. Garcia announced his retirement immediately after that match, which frames the meeting as a bookend more than an ongoing series.

The styles line up as a contrast. Garcia built his career on a guard game and a relentless back-take, with the Rear Naked Choke his most frequent finish at 14 recorded wins. Giles works from the legs, with the Inside Heel Hook his top submission at 8 wins. Fittingly, the one meeting was decided at the legs: Giles closed it out with a Lachlan Lock rather than trading in the positions Garcia spent a career dominating.

On the broader records, Garcia sits at 78 wins and 18 losses across 96 recorded matches for an 81% win rate, while Giles is at 35 wins and 22 losses across 57 recorded matches for a 61% win rate. Their submission rates on wins are close, 65% for Garcia and 66% for Giles, so the difference between them is less about finishing ability and more about how they get there.