One common scenario leading to a no-contest is the occurrence of an accidental illegal strike resulting in injury. In such cases, neither fighter is declared the winner, and the bout is called off.
If a match is declared a no contest, bets that have yet to be determined will be void. Any selections that have already occurred will be settled in accordance with standard ruling. eg a bet on a fighter to win in Round 1 when the Fight was declared a no contest in round 2 would be a loser.