as far as I know, the only madjack sponsor that falls into this category is Carib:
"When wagering on tennis matchups both players must start the match for your wager to have action. If one player retires from the match due to injury or for any other reason, then that player loses his or her matchup. If a player is unable to start his or her match, this is considered a walkover and for wagering purposes all bets on that matchup will be no actioned since both players did not start the match. If a tennis match that is in progress or has not yet started is postponed to the next day due to rain, bad light or any other reason, then all wagers on that match will remain active until the completion of the match."
most books are now saying that match must be completed for bet to stand.....but there are some out there that say only one point must be played
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