🏛️Official — ONE Championship
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Combat Sports
1 players
indoor
glove, hand wraps
10 essential rules
Muay Thai under ONE Championship is the modernized professional ruleset operated by the Singapore-based ONE FC promotion (founded by Chatri Sityodtong in 2011). ONE's Muay Thai division uses 4-ounce MMA-style open-fingered gloves (lighter than traditional 8-ounce boxing gloves used in Thailand), ...
Clinch fighting permitted — fundamental to Muay Thai; Knees + elbows in clinch are legal and heavily scored; Sweeps from clinch (without slamming) are legal
Punches (closed fist); Kicks (legs, body, head); Knee strikes (clinch + flying)
Standing 10-count for knockdowns; 3-knockdown rule per round: 3 knockdowns = TKO; KO + TKO via stoppage = total victory
3 rounds × 3 minutes (60-second rest between rounds); Championship fights: 5 rounds × 3 minutes
Foot sweeps + reaps to bring opponent down (with feet only, no judo throws); Holding+slamming explicitly prohibited
4-oz MMA-style fingerless gloves — open palm (distinct from traditional 8-10oz Thai boxing gloves); Mouthguard: mandatory; Groin protector: mandatory (men); chest protector for women
Ring: square boxing-style ring (typically 6m × 6m to 7m × 7m), 4 roped sides, padded canvas floor; Distinct from MMA cage — fighters bounce off ropes; Mandatory padded turnbuckle corners
Two competitors per match; Weight classes (Men, kg): Strawweight, Flyweight, Bantamweight, Featherweight, Lightweight, Welterweight, Middleweight, Light Heavyweight, Heavyweight (ONE-specific scaling); Women's divisions: Atomweight, Strawweight, Flyweight, Bantamweight, Featherweight
3 rounds × 3 minutes (60-second rest between rounds); Championship fights: 5 rounds × 3 minutes; Punches (closed fist)
10-Point Must scoring (boxing-style); Judges weight: damage dealt, ring generalship, clean strikes, aggression, defense; Distinct from Thai-traditional scoring (which weights ring-walking, technique purity, dominance late in the fight); ONE's Westernized scoring favors knockout-attempting aggression
Perform the Wai Kru Ram Muay with genuine sincerity
The pre-fight ritual honoring teachers, the ring, and Buddha is sacred to Muay Thai's Thai Buddhist heritage. Rushing through it, performing it mockingly, or skipping it to appear 'tough' is deeply disrespectful. Even international fighters at ONE Championship are expected to engage with it genuinely, not as spectacle.
ONE Championship explicitly maintains the Wai Kru as part of its Muay Thai ruleset and production, reinforcing its cultural centrality.
Never let the Mongkol touch the ground
The Mongkol is a sacred headband blessed by a monk and worn during the Wai Kru for spiritual protection. It must not touch the ground, be stepped over, or be casually tossed aside. The trainer places and removes it ceremonially; the fighter does not remove it themselves. Mishandling it is considered a serious breach of respect for the spiritual tradition.
Never taunt or stand over a knocked-down opponent
Standing over a downed opponent to gloat, taunt, or perform celebratory gestures while they are still on the canvas is considered deeply unsportsmanlike. Muay Thai's tradition values humility in victory; acknowledging a finish with grace is the expectation, not bravado directed at an incapacitated opponent.
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Never publicly disrespect your Kru (trainer) or corner
The Kru-student relationship carries deep spiritual weight in Thai Buddhist tradition. Publicly blaming your trainer after a loss, dismissing corner advice on camera, or undermining your gym's reputation is a serious cultural violation — not merely bad PR. The fighter is seen as an extension of the Kru's reputation, and vice versa.