Bookmakers have different rules regarding how they settle player retirements, either paying out on the player who progresses through to the next round regardless of the current score at the time of the retirement (1 ball), paying out on the player who progresses as long as one set has been completed (1 set), or requiring the whole match to be fully completed for bets to stand (Match complete).

1-Ball Sportsbooks (require one point to be played for the match to have action)

• DraftKings - 1 ball
  "Match Moneyline Markets - In a Grand Slam, ATP, WTA, Challenger Tour, Davis Cup, Fed Cup, United Cup, or Olympic Match where at least one point has been completed but the Match does not reach its normal, natural, or intended end, bets on the player or team declared the winner of the Match by the Match's official governing body, the player or team in the Match progressing to the next round of the Competition, or the player or team in the Match declared the champion in the case of the Match being a final, will be settled as won, and bets placed on all other Selections will be voided. In a Grand Slam, ATP, WTA, Challenger Tour, Davis Cup, Fed Cup, United Cup, or Olympic Match, if at least one point has not been completed, bets on such Match will be voided. For all Matches other than Grand Slam, ATP, WTA, Challenger Tour, Davis Cup, Fed Cup, United Cup, or Olympic Matches (for example only, ITF Matches), if the Match starts and does not reach its normal, natural, or intended end bets on such Match will be voided. Bets will be voided if they are placed after the last completed point of that Match."
  
  
• Fanatics - 1 ball
  "In the event of a retirement or disqualification at any point after the match has started, the player/team that is awarded the victory/progresses to the next round will be settled as the Winner in the Match Result/Moneyline market. Selections placed on the retiring or disqualified player/team will be voided."
  
  
• FanDuel - 1 ball
  "In the event of a retirement or disqualification at any time after the match has started, all bets on the completed service games & points will stand. For match betting purposes, regardless of the point in the match, bets on the retiring player or pair will be void, while bets on the player or pairing progressing to the next round (or winning the tournament in the case of a final) will be deemed the winner, across all grades of tennis. All other markets will be voided unless the market has already been unequivocally determined, or unless otherwise states. Any markets that have already been determined will be settled as such."
  
  
• Kalshi - 1 ball
  "Before August 1: markets are settled based on who advances. From August 1 onward: markets will be listed as Player A vs Player B, and: If a match is cancelled or does not occur, Kalshi will halt trading and pay out to the last traded price for each player (before the earliest notice of the match being cancelled). If a match starts (at least one ball has been played), the match will be determined by the player who wins the match or advances to the next round (as declared by the official). So starting August 1, pre-match withdrawals won't automatically result in a "No" resolution like before. Instead, the payout depends on how much you bought/sold for before the match was called off."
  
  
• Polymarket - 1 ball
  "This market will resolve to "Fils" if Arthur Fils advances against Pablo Carreno Busta. This market will resolve to "Carreno Busta" if Pablo Carreno Busta advances against Arthur Fils. If the match ends in a tie, is canceled, or is not completed by August 1, 2025, this market will resolve to 50-50."
  
  

1-Set Sportsbooks (require one set to be completed for the match to have action)

• Bet105 - 1 set
  "Prematch in the case of a player retires or is disqualified bets on the Match moneyline will have action as long as the first set is completed, otherwise bets will be void. Bets on other markets will have action only if the specific period was completed before retirement or disqualification. For Live Betting match must be completed for ML to have action."
  
  
• Betfair - 1 set
  "If a player or pairing retires or is disqualified in any match, the player or pairing progressing to the next round (or winning the tournament in the case of a final) will be deemed the winner. However if less than one set has been completed at the time of the retirement or disqualification then all bets relating to that individual match will be void."
  
  
• BetMGM - 1 set
  "Wager on one or more specified players(s) versus one or more other specified players(s) in a designated match. If one player withdraws (retires) or is disqualified after the first set has been completed, the player progressing to the next round or who is awarded the match by the umpire will be considered the winner. If the first set has not been completed, all match bets will be cancelled."
  
  
• BetOnline - 1 set
  "One full set must be completed for money line wagers to have action.The full match must be completed for any spread or total wagers to have action. This includes both game spreads and totals and set spread and totals. The full match must also be completed for any prop bets to have action with the exception of 1st set bets if it has already been completed."
  
  
• BetRivers - 1 set
  "Match (Moneyline) bet offers are based on the general principle of tournament progress or tournament win, depending on which phase of the competition the match refers to. The player/team progressing to the next round or winning the tournament is to be considered as the winner of the bet regardless of match duration, withdrawals, disqualifications, etc. These bets require at least one set to be completed for bets to stand."
  
  
• Circa - 1 set
  "Matches are considered official for wagering purposes after 1 set is completed and a winner is declared, regardless of either player's advantage in sets and/or games won. All wagering options that encompass a full match, including but not limited to money line, total games played, games won spread, sets won spread, associated derivatives, player props etc. will have action regardless of how many sets are completed beyond the aforementioned qualifier as long as a winner is declared, unless otherwise stipulated on display boards, printed sheets, or the mobile app."
  
  
• ESPNbet - 1 set
  "Money Line or Match Winner markets will be considered as action after the completion of the first set, with the player progressing to the next round being deemed the winner. For these markets only, wagers on the withdrawing player (ie, the player that does not progress to the next round or win the tournament) will be voided."
  
  
• HardRock - 1 set
  "In case of retirement, defaulting or disqualification of any player during a contest: Money Line wagers: If the first set has been completed, the player advancing to the next round will be graded as win. The player not advancing will be graded as loss. If the first set has not been completed, all Money Line bets will be cancelled. All other markets: Bets on markets with undetermined results will be cancelled o Bets on markets where the result was confirmed at the time of retirement, defaulting or disqualification will stand."
  
  
• Matchbook - 1 set
  "One full set must be completed for 'Moneyline' bets to stand. If less than one set is completed, all 'Moneyline' bets will be considered void."
  
  
• NoVig - 1 set
  "Match Retirements & Disqualifications: If a player retires, withdraws, or is disqualified after the first set is completed, all main moneyline markets will be settled (not voided). For example, if Player A retires after the first set and Player B is declared the winner, the moneyline market is settled as a win for Player B and a loss for Player A."
  
  
• Pinnacle - 1 set
  "If a competitor retires or is disqualified bets on the Match Money Line market will have action as long as one Set has been completed, otherwise these bets will be voided. Bets on other markets will be deemed void unless the period was played to completion before the retirement or disqualification."
  
  
• Sporttrade - 1 set
  "In the case a player withdraws or is disqualified once the match has started, trades made on the Winner market will remain in effect, as long as at least one Set has been completed, otherwise these trades will be void."
  
  
• TheScore - 1 set
  "Money Line or Match Winner markets will be considered as action after the completion of the first set, with the player progressing to the next round, lifting the trophy in the case of a final, or being awarded the win in the case of a round robin tournament being deemed the winner. For these markets only, wagers on the withdrawing player (ie, the player that does not progress to the next round or win the tournament) will be voided."
  
  

Match Complete Sportsbooks (require the full match to be completed for action)

• Bet365 - Match complete
  "In the event of a match starting but not being completed then all bets will be void unless after the start of the match a player is disqualified in which case the player/team progressing to the next round or being awarded the victory will be deemed the winner for settlement purposes."
  
  
• Bookmaker - Match complete
  "In the event of a match starting but not being completed, all bets will be void unless (after the start of the match) a player is disqualified, in which case the player/team progressing to the next round or being awarded the victory will be deemed the winner for settlement purposes.If a tennis match is not completed because of a player retirement or disqualification, all handicap and total games bets will be considered void, regardless of the score of the match. Such wagers will be cancelled and the monies refunded"
  
  
• Bovada - Match complete
  "In the event of a match starting but not being completed, all bets will be void unless the result of the wager has already been determined. If a player is disqualified after the start of the match and the opposing player/team progresses to the next round or is awarded the victory, the opposing player/team will be deemed the winner for settlement purposes."
  
  
• Caesars - Match complete
  "Tennis - All tennis matches must be played to their natural completion for action unless otherwise stipulated on the betting sheet. If it is a 3 set match, one player must win 2 complete sets. If it is a 5 set match, one player must win complete 3 sets. If any retirement/disqualification takes place prior to this taking place, all bets will be refunded."
  
  
• Fliff - Match complete
  "In the event of a match starting but not being completed then all picks will be void."
  
  
• PrimeSports - Match complete
  "In the event of a match starting but not being completed, all bets will be void unless a player is disqualified, in which case the player/team progressing to the next round or being awarded the victory will be deemed the winner for settlement purposes. This only applies to the moneyline. All totals and handicaps/spreads will be voided."
  
  
• Stake - Match complete
  "A tennis match is deemed to have started with the first serve of the match. If a player retires, is disqualified, or there's a walkover in a match, all markets will be void unless their outcome has already been unconditionally determined. This includes all undecided point, game, or set-related bets."