Brainstorming plus Warm-up
I was inspired by ancient Korean martial arts called "Takkyeon". The history of Takkyeon goes far back to the Goguryo dynasty 2000 years ago. It uses mainly feet but grappling and judo-like skills are also incorporated. The player wins when he kicks the opponent's face or the opponent's body falls to the ground. It is told that when you see the Takkyeon match, it looks like the players are dancing instead of fighting.
No reference whatsoever (purely memory and little bit of imagination ^^) although I must get into the habit of using reference...