The Referee finishes her English introduction with the word "OK" and immediately Sancha lets rip into her opponent with a hefty right underarm punch that slams into Cerise's belly with a deep, meaty thwack.

I'm not sure whether the Ref. intends the fight to start at that point - the previous bouts have started with the combatants in their respective corners - but she certainly doesn't try to stop the action.  Cerise lets out a loud belching groan and buckles forward at the waist.  As the French girl drops her head Sancha wraps her arm around her neck putting her in a tight underarm headlock.