If a player withdraws during the first set of a match, then the bet will be void. However, if the player retires from a match after the completion of the first set, we will base the settlement of your bet on tournament progression.
For instance, you have placed a bet on Carlos Alcaraz to beat Novak Djokovic at Wimbledon. Alcaraz retires due to injury in the third game of the second set. Your bet will be settled as a loss as Djokovic progresses to the next round.