When a tennis player retires during a match, your bet is settled by the retirement rule in your bookmaker's terms, and the three common rule types do not always agree. The bet is void unless the match is completed, it stands once a set has been completed, or it stands as soon as play has started; under the last two, the player who goes through is the winner.
One public rule book settles it for bookmakers authorised in NSW. Under the Bookmaker Declared Betting Events Betting Rules, a single bet on a match that a player fails to complete after the first serve is void and refunded (clause 5.2.8.3). Other bookmakers write their own rules, so one retirement can be a refund at one bookmaker and a settled bet at the next.
The three retirement rule types, side by side
Each rule type sets a trigger: how much of the match must be played before the result stands.
| Rule type | Retirement before the first set is finished | Retirement after a completed set |
|---|---|---|
| Void unless the match is completed | Match bets void, stakes refunded | Match bets void, stakes refunded |
| Stands once a set is completed | Match bets void, stakes refunded | The player who goes through is the winner |
| Stands once play has started | The player who goes through is the winner | The player who goes through is the winner |
The trigger can be worded as the first serve, ball or point, and a disqualification can share the clause, as it does in the NSW rule book. A rule also says whether markets the score had already decided are settled or refunded, which the worked example below shows.
What the NSW rule book says
The NSW Bookmaker Declared Betting Events Betting Rules are made under the Betting and Racing Act 1998 (NSW) and bind bookmakers licensed in NSW and authorised by the Minister to take bets on declared events. The tennis clauses, read in October 2026:
| Clause | What it says |
|---|---|
| 5.2.8.1 | A match starts with the first serve |
| 5.2.8.2 | If the scheduled number of sets is not completed, bets not decided when the match ends are void and refunded, subject to 5.2.8.3 |
| 5.2.8.3 | If a player or doubles team withdraws, is disqualified or fails to complete a match after it has started, every single bet on the match is void and refunded, and a multi is recalculated as for an abandoned event |
| 5.1.9(c) | That recalculation pays the stake times the prices of the legs already decided in your favour |
Read literally, clause 5.2.8.3 covers every single bet on the match, including a first set bet the score had already decided. Like the rest of part 5.2, the clauses apply unless agreed otherwise when the bet is made. A bookmaker licensed in another state or territory publishes its own tennis rules, and ACMA's register shows which authority licenses each provider.
Worked example: a retirement mid second set
Illustrative prices and an invented score. Player A wins the first set 7-6 after a tiebreak. Player B leads the second set 5-4 when Player A retires injured, so Player B goes through. That is 22 games played: 7 + 4 = 11 for Player A and 6 + 5 = 11 for Player B.
The match bets first, with $20 on each player:
| Rule type | $20 on Player A at $1.62 | $20 on Player B at $2.30 |
|---|---|---|
| Void unless the match is completed, as in the NSW rule book | Void: $20 back | Void: $20 back |
| Stands once a set is completed | Loses: $0 | Wins: $46.00 |
| Stands once play has started | Loses: $0 | Wins: $46.00 |
Had Player A retired at 4-3 in the first set instead, the middle rule would have refunded both bets as well, and only the last rule would have paid Player B.
The other markets on the same match split on a different question: had the score already decided them?
| $20 bet | Decided when Player A retired? | Where decided markets are settled | Under the NSW rule book |
|---|---|---|---|
| Player A to win the first set at $1.70 | Yes, won 7-6 | Wins: $34.00 | Void: $20 back |
| A tiebreak in the match, at $2.75 | Yes, the first set had one | Wins: $55.00 | Void: $20 back |
| Over 21.5 games at $1.90 | Yes, 22 games played | Wins: $38.00 | Void: $20 back |
| Under 21.5 games at $1.90 | Yes, it can no longer win | Loses: $0 | Void: $20 back |
| Player B +3.5 games at $1.85 | No, the margin was level | Void: $20 back | Void: $20 back |
| Player B to win 2-1 at $4.75 | No | Void: $20 back | Void: $20 back |
Example: Return = stake x price, so the first set bet pays $20 x 1.70 = $34.00 where decided markets stand. Both sides of the 21.5 games line were decided by the 22nd game, so under that kind of rule the under loses rather than being refunded.
Which markets the score has already decided
When a player stops, a market falls into one of three groups:
| Group | Markets | At a retirement |
|---|---|---|
| Decided once part of the match is complete | First set winner, first set total games, any set already finished | Settled where decided markets stand |
| Decided the moment something happens | A player to win a set, once they have; a tiebreak in the match, once one is played; an over on games or aces, once the count passes the line | Settled where decided markets stand |
| Open until the match ends | The match result, set betting, game handicaps, and any under on a total | Settled by the match rule or refunded, though a selection the score has already ruled out has lost |
A set handicap can move between groups: once Player B wins a set in a best of three match, Player B +1.5 sets has already won. Tennis betting explains each market in full.
Walkovers: the match that never starts
A walkover is a match that never starts: one player withdraws before the first serve, and the other goes through without playing. The retirement trigger is never reached, so the walkover clause applies, and match bets on a walkover are commonly void and refunded. Check the wording rather than assuming it.
An outright on the tournament is different. If the player has already played a match there, a walkover ends their event like any loss, and the outright loses. A withdrawal before the player's first match is the all-in question: under an all-in rule, the NSW rule book's default (clause 5.1.1), the bet stands with no refund.
At a Grand Slam, a withdrawal before the first round can bring in a lucky loser rather than a walkover (2026 Official Grand Slam Rule Book), which changes the opponent on a match bet, as Australian Open betting explains.
Retirements in multis and same game multis
A retirement inside a multi is settled leg by leg. The NSW rule book drops the void tennis leg and pays the multi on the legs that won (clauses 5.2.8.3 and 5.1.9(c)).
Example: Illustrative prices. A $10 multi with a soccer leg at $1.80, a basketball leg at $1.65 and a tennis leg at $1.50 would pay $10 x 1.80 x 1.65 x 1.50 = $44.55. The soccer and basketball legs win and the tennis player retires: with that leg void, the multi pays $10 x 1.80 x 1.65 = $29.70.
Under a rule that lets the result stand, the tennis leg is settled instead: a winner if your player went through, a lost multi if not. A same game multi on one tennis match follows the bookmaker's SGM terms, which can void the whole ticket; same game multi rules cover void legs in full.
Why two bookmakers can settle one retirement in opposite ways
The two sides of one match can sit with bookmakers on different rules, and a retirement then pushes them in opposite directions. Take an illustrative arbitrage: Player A at $2.10 with Bookmaker A, whose rule voids the match unless it is completed, and Player B at $2.05 with Bookmaker B, whose rule lets the result stand once play has started. The book is 1 / 2.10 + 1 / 2.05 = 47.6% + 48.8% = 96.4%, and $100 split in proportion to those shares is $49.40 on Player A and $50.60 on Player B.
A finished match returns $49.40 x 2.10 = $103.74 or $50.60 x 2.05 = $103.73, a profit of $3.74 or $3.73. If Player B retires, Bookmaker A refunds $49.40 and the Player B bet loses: a $50.60 loss on the $100, more than 13 times the smaller profit (50.60 / 3.73 = 13.6).
An exchange publishes its own retirement rules too, so a bookmaker bet laid at an exchange carries the same risk. Arbitrage rule mismatches works through a tennis arb settled on different retirement rules, and arbitrage betting covers the maths.
Risk: Betting involves risk. An arbitrage or a middle only works if every bet is accepted at the price shown and settled the same way, and a retirement can leave one side standing on its own. Bookmakers can also limit stakes, void bets or close accounts under their own terms. See responsible gambling for limits and support.
How to find the retirement rule in your bookmaker's terms
- Open the bookmaker's sports betting rules at the tennis section; the general terms may not carry it.
- Search the page for "retire", "walkover", "withdraw", "disqualif" and "completed".
- Note the trigger: a completed match, a completed set, or the first serve, ball or point.
- Check whether decided markets are settled or refunded, and whether totals, handicaps and set betting have clauses of their own.
- Read the multi and same game multi clauses for a void leg.
- Read the walkover clause, and the outright clause for a player who withdraws before the tournament.
- Recheck before a big tournament, because terms change.
Mistakes that turn a retirement into a loss
| Mistake | The cost in this page's examples | How to avoid it |
|---|---|---|
| Assuming the player who goes through always gets paid | Under a void rule, $20 on Player B at $2.30 returns $20, not $46.00 | Read the trigger before you bet |
| Assuming the NSW refund applies everywhere | Under a rule where the result stands, $20 on Player A is lost, not refunded | Check which rules bind your bookmaker |
| Covering both sides at bookmakers on different rules | The illustrative arb lost $50.60 when Player B retired | Read both bookmakers' retirement rules before treating two prices as an arb |
| Forgetting decided markets | A first set bet already won is refunded, not paid, under the NSW rule book | Know how your rule treats decided markets |
| Leaving a doubtful player in a multi | One void leg cut the illustrative $44.55 multi to $29.70 | Weigh the leg before you add it |
Where the Terminal fits
B337's Terminal compares prices from 40+ bookmakers across racing and sports, and its sports board lists tennis matches with head to head, line and total prices while bookmakers are offering them. Two columns side by side can sit under different retirement rules, so a price gap between them is only like for like once you have read both. Because the board refreshes prices in cycles, the bookmaker's own price is the one to check when you bet. A free account opens a limited view of the Terminal with live odds, and sports betting explained covers the settlement rules other sports share.
Risk: Betting involves risk. A higher price under a stricter retirement rule is not the same bet, and a tennis bet can lose however the rule reads. See responsible gambling for limits and support.