Australian Open betting means betting on the Grand Slam played at Melbourne Park each summer, either on a single match or on who wins the tournament, at decimal prices set before play. Men's singles main draw matches are best of five sets and women's singles best of three, and a final set that reaches six games all is settled by a 10-point tiebreak.
The 2027 tournament runs from 11 to 31 January, with main draw play from Sunday 17 January and the singles finals on 30 and 31 January, as Tennis Australia announced in March 2026. Online, a bet on any match has to be placed before that match starts, with a provider holding an Australian state or territory licence.
How the Australian Open format shapes the betting
The 2026 Official Grand Slam Rule Book makes men's singles main draw matches five-set contests, with other matches best of three unless the tournament sets another format, and a 10-point tiebreak in the final set. The tournament is played on cushion acrylic hard courts, as its venue guide sets out (checked October 2026). The tournament's own guide to scoring (December 2024) gives each event's format:
| Event | Format | What it means for betting |
|---|---|---|
| Men's singles main draw | Best of five; a 7-point tiebreak at six games all in sets one to four, and a 10-point tiebreak at six all in the fifth | Favourites shorten, and handicaps and totals run higher than over three sets |
| Women's singles main draw | Best of three; a 7-point tiebreak at six all in sets one and two, and a 10-point tiebreak at six all in the third | Prices on the scale of a tour match |
| Qualifying (played in Opening Week in 2026) | Best of three, men included | A men's qualifying match is priced like a tour match, not a five-setter |
Both singles draws hold 128 players. At the 2026 tournament, 16 places in each went to qualifiers, who had to win three matches from 128-player qualifying fields to get there. A champion from the main draw wins seven matches: the rounds of 128, 64, 32 and 16, then the quarterfinal, semifinal and final. Tennis betting shows how much the extra two sets move a match price.
Outright and match markets
Two kinds of market run through the fortnight. An outright market prices every player in the men's or women's singles draw to win the title, one price each, and futures betting explains how tournament and season outrights work, margins included.
A match market prices one match at a time: head to head, set betting, first set winner, game handicap, total games and player props such as aces. Set betting on a men's singles main draw match has six possible results: a win or a loss by three sets to none, one or two. An outright carries the risk of seven matches and of a withdrawal before the first one, while a match bet is settled match by match, under the bookmaker's retirement rule if it ends early.
Australian Open odds explained
A decimal price includes your stake, and 1 / price is the chance it implies. In an illustrative men's first-round match priced at $1.25 and $4.00, the implied chances are 80.0% and 25.0%, adding to 105.0%. The 5.0 points above 100% are the overround: the bookmaker's margin, spread across both prices. Dividing each by 1.05 gives fair chances of 76.2% and 23.8%, fair prices of 1 / 0.762 = $1.31 and 1 / 0.238 = $4.20.
An outright price compounds the rounds. With illustrative chances, treating the seven matches as independent with the same chance each time, which real draws are not:
| Chance in each of 7 matches | Chance of the title | Fair outright price |
|---|---|---|
| 80% | 0.80 to the power of 7 = 0.2097, or 20.97% | 1 / 0.2097 = $4.77 |
| 75% | 0.75 to the power of 7 = 0.1335, or 13.35% | 1 / 0.1335 = $7.49 |
A player rated an 80% chance in every round still loses somewhere along the way 79.03% of the time (1 - 0.2097). Outright markets also spread the margin over the whole draw. If an illustrative men's market adds to 125%, a player at $10.00 (a 10.0% implied chance) is a fair 10.0 / 1.25 = 8.0% chance once the margin is spread evenly, a fair price of $12.50. Bookmaker margin shows how to measure a whole market.
All-in rules, withdrawals and lucky losers
An outright stands or falls on the whole tournament, so the rule that matters is what happens if your player never starts. Under the NSW rule book, bets are made on an all-in basis unless something else is agreed at the time (clause 5.1.1): the bet stands whether or not the player starts, with no refund. The other common shape refunds a player who never starts the tournament, so check which one your bookmaker's outright terms use before you bet.
When a player pulls out before the first round, the place can go to a lucky loser, one of the players beaten in the last round of qualifying (2026 Official Grand Slam Rule Book). That leaves a match bet on the original pairing pointing at a match that will not happen, and the bookmaker's rule on a changed opponent decides it. Once a player has played a match, a withdrawal, walkover or retirement ends their event, and an outright on them loses like any other exit.
Heat, roofs and start times
Melbourne is on AEDT (UTC+11) in January, so a 7 pm AEDT start is 6:30 pm in Adelaide, 6 pm in Brisbane, 5:30 pm in Darwin and 4 pm in Perth. Online betting on that match closes at the start wherever you are, and most matches follow the one before them on the same court, so start times move with the day's play.
The tournament's 2026 Extreme Heat Protocol measures conditions on a heat stress scale of 1 to 5:
| Reading | What happens |
|---|---|
| 4, recorded in the first two sets of a women's singles match or the first three of a men's | A 10-minute cooling break before the third set (women) or the fourth set (men) |
| 5 | Outdoor matches play on to an even number of games in the set, or the end of a tiebreak, then stop; on Rod Laver Arena, Margaret Court Arena and John Cain Arena the roof closes for the rest of the match |
Players get at least 30 minutes' notice before play resumes. A suspension pauses a match rather than ending it, so a completed match settles on its final score like any other. The protocol can change from year to year, so check the version for the tournament you are betting on.
Retirements in five-set matches
A best of five match runs longer, so there is more time for a retirement, and a late one leaves more markets already decided. Your bookmaker's rule settles it: the bet is void unless the match finishes, stands once a full set has been played, or stands as soon as play begins. Under the NSW rule book, single bets on a match that a player or doubles team does not finish are refunded, while multis are recalculated (clause 5.2.8.3).
Example: Illustrative score and lines. Player A leads 6-4 6-4 2-1 in a men's singles match when Player B retires: 6 + 6 + 2 = 14 games to 4 + 4 + 1 = 9, or 23 in all. Where decided markets stand, the first and second set winners are settled. A total of 38.5 games and Player A -6.5 games are not decided, because 23 games is short of the line and a five-game margin had not reached seven, so they are refunded.
The match result itself is a refund under a void-unless-completed rule and a win for Player A under the other two. Tennis retirement rules work through every rule type on one match.
How to bet on the Australian Open, step by step
- Check the provider: look it up by trading name on ACMA's register of licensed wagering providers.
- Pick the market: an outright before the tournament, or one match at a time.
- Read the tennis rules: the retirement trigger, walkovers, the outright all-in clause, and how a 10-point tiebreak is counted (the set ends 7-6).
- Turn prices into chances, take out the margin, and compare bookmakers.
- Convert the start time to your time zone, and bet before the match starts.
- Before the tournament, set a deposit limit with each bookmaker you use. Lowering it takes effect straight away; raising it takes 7 days.
Under the Interactive Gambling Act 2001, a sports bet placed or accepted after the event has begun is an in-play bet (s 10B). Online sports betting is lawful only while the event has not begun, through a provider holding a state or territory licence (s 8A(3), s 15AA). In-play betting in Australia covers the law.
Mistakes to avoid at the Australian Open
| Mistake | The cost, on this page's illustrative numbers | Fix |
|---|---|---|
| Backing an outright early under an all-in rule | The whole stake is lost if the player withdraws before the first round, however long the price | Read the outright rule, or wait for the draw |
| Treating a men's singles main draw match like a best of three | Three-set handicaps and totals sit well below five-set ones | Check the format on the bet slip |
| Reading a short favourite as a likely champion | 80% in every round is a 20.97% title chance | Multiply the rounds |
| Expecting a retirement to pay the player who goes through | A void-unless-completed rule refunds both sides | Read the retirement trigger |
| Planning in the wrong time zone | A 7 pm AEDT start is 4 pm in Perth | Convert the start time |
Comparing Australian Open prices on the Terminal
During the tournament, bookmakers price each round independently, so one player can carry different prices at different bookmakers. When matches are up, tennis appears on the sports board of B337's Terminal, with head to head, line and total markets. The Terminal sets out prices from 40+ bookmakers across racing and sports in a column each and picks out the best available price on each selection.
Each figure is collected on a repeating cycle rather than tick by tick, so check the bookmaker's own price before you place the bet. A free account opens a limited view of the Terminal with live odds. The rules tennis shares with other sports are in sports betting explained.
Risk: Betting involves risk. An outright can be lost to one injury, a higher price on a match still loses when the player loses, and there is no guarantee of profit. Limits and support are on the responsible gambling page.