The regulation in force states that a bet on a sporting event is considered valid if the event takes place within 12 hours following the date established in the official programme.

After this deadline, you are entitled to a refund of your stake if you have placed a single bet. If, on the other hand, a multiple bet has been placed, the postponed event will be paid out at the original odds and the remaining events are paid if successful.

Tournaments follow a different set of rules regarding cancelled/postponed matches. For example, in tennis, if Player A vs Player B is postponed until a day later, and neither plays another game in that time, the bet stands.

Our article What happens if an event is suspended? can be viewed for more related information.