Section 4: Players & Officials
- 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
- Officials: 1 in-ring referee + 3 judges + ringside physician + ONE Championship commission inspector