Submission wrestling (also known as submission fightingsubmission grapplingsport grappling, or simply as No-Gi) or Combat wrestling (in Japan), is a formula of competition and a general term describing the aspect of martial arts and combat sports that focus on clinch and ground fighting with the aim of obtaining a submission using submision holds. The term "submission wrestling" usually refers only to the form of competition and training that does not use a "jacket", "gi," or "combat kimono," often worn with belts that establish rank by color.

The sport of submission wrestling brings together techniques from Folk Wrestling, Luta Livre, Freestyle wrestling, Brazilian Jiu Jitsu, Judo and Sambo. Submission fighting as an element of a larger sport setting is very common in mixed martial arts.,