mixed martial arts match; cross-discipline fight
Refers to a bout where fighters from different combat sports or martial arts compete under unified or special rules. Often used in contexts like boxing vs. karate, or early MMA-style events.
In the cross-discipline match, a boxer fought a karate practitioner.
あのイベントは異種格闘技戦がメインだった。
That event featured cross-discipline fights as the main attraction.