Tennis betting is staking money on a tennis match or tournament at a decimal price: on who wins the match, the score in sets, a game handicap, the total games or the tournament winner. A completed match always has a winner, so the head to head market has two prices: at an illustrative $1.33, $50 on Player A returns $66.50 if Player A wins.
Two things set tennis apart. The format changes every price, because a best of five match favours the stronger player more than a best of three. And a match can end early when a player retires, leaving the bookmaker's retirement rule to decide your bet. Online, a tennis bet has to go on before the match starts, the same rule sports betting explained sets out for every sport.
Tennis betting markets, priced on one match
With illustrative prices for a best of three match between Player A and Player B, not a real match:
| Market | The question it answers | Illustrative prices |
|---|---|---|
| Head to head | Who wins the match? | A $1.33, B $3.40 |
| Set betting | The final score in sets | A 2-0 $2.25, A 2-1 $3.15, B 2-1 $5.90, B 2-0 $7.50 |
| First set winner | Who takes the first set? | A $1.47, B $2.70 |
| Game handicap | Who wins once one player gets a start in games? | A -4.5 games $1.92, B +4.5 games $1.90 |
| Total games | How many games are played in all? | Over 21.5 $1.87, under 21.5 $1.95 |
| Total sets | Does the match go to a third set? | Over 2.5 sets $2.08, under 2.5 sets $1.75 |
Set betting and the handicap pay more for being more precise, and the total asks how long the match runs. Tennis handicap betting covers game and set handicaps, and tennis total games betting the count of games.
Each market carries its own margin. The implied chances (1 / price) add to 1 / 1.33 + 1 / 3.40 = 75.2% + 29.4% = 104.6% on the head to head. On set betting they add to 1 / 2.25 + 1 / 3.15 + 1 / 5.90 + 1 / 7.50 = 106.47%, about 106.5%. With the margin spread evenly, $100 returns about 100 / 1.046 = $95.60 on average on the first and 100 / 1.0647 = $93.92 on the second. Bookmaker margin shows the method.
Tip: If your only view is who wins, the head to head is the bet that matches it: here it carried 104.6% against 106.5% on set betting. Set betting and handicaps suit a view on how the match plays out.
How each market settles on one final score
Say Player A wins 6-4 3-6 6-3. That is two sets to one, 15 games to 13, a two-game margin and 28 games in all. With $20 on each bet at the prices above:
| Bet | Wins if | Result | $20 returns |
|---|---|---|---|
| Player A head to head at $1.33 | Player A wins the match | Won in three sets | $26.60 |
| Player A to win 2-1 at $3.15 | Player A wins in three sets | 2-1 | $63.00 |
| Player A first set at $1.47 | Player A wins set one | 6-4 | $29.40 |
| Player A -4.5 games at $1.92 | Player A wins 5 or more games more than Player B | Margin of 2 | $0.00 |
| Player B +4.5 games at $1.90 | Player B finishes 4 or fewer games behind, or ahead | 2 behind | $38.00 |
| Over 21.5 games at $1.87 | 22 games or more are played | 28 games | $37.40 |
| Over 2.5 sets at $2.08 | The match goes to a third set | Three sets | $41.60 |
Example: Made-up prices and score, for illustration only. Each return is stake x price, so the over 2.5 sets bet pays $20 x 2.08 = $41.60, a $21.60 profit.
Player A's backers win the head to head but lose the handicap: the dropped 3-6 set gave three games back.
Best of three or best of five: how the format moves the price
Tour singles are best of three sets, and men's singles main draw matches at the Grand Slams best of five (2026 Official Grand Slam Rule Book), which is why Australian Open betting prices men's and women's matches differently. A longer match gives the stronger player more time to recover a lost set, so the same two players carry a different price in each format. Take an illustrative player who wins 65% of sets, treating each set as independent (real sets are not, but the shape holds), with p the chance of winning a set and q = 1 - p:
- best of three: chance = p x p x (1 + 2 x q) = 0.65 x 0.65 x (1 + 0.70) = 0.4225 x 1.70 = 0.71825, about 71.8%
- best of five: chance = p x p x p x (1 + 3 x q + 6 x q x q) = 0.274625 x (1 + 1.05 + 0.735) = 0.274625 x 2.785 = 0.76483, about 76.5%
| Format | Player A's chance | Fair price | Player B's chance | Fair price |
|---|---|---|---|---|
| Best of three | 71.8% | $1.39 | 28.2% | $3.55 |
| Best of five | 76.5% | $1.31 | 23.5% | $4.25 |
Fair price = 1 / chance, so 1 / 0.71825 = $1.39 and, for Player B over five sets, 1 / (1 - 0.76483) = 1 / 0.23517 = $4.25. Scale the chances up to the same 104.6% book as the market above, and the five-set prices come out near 1 / (0.76483 x 1.046) = $1.25 and 1 / (0.23517 x 1.046) = $4.07. Over three sets they were $1.33 and $3.40.
The other markets move too: set betting has six outcomes over five sets (3-0, 3-1 or 3-2 either way), and handicaps and totals sit higher because more games are played.
Tiebreaks and final sets under the current rules
Under the ITF Rules of Tennis (2026), a tie-break set goes to a tie-break game at six games all, won by the first player to seven points with a two-point margin (Rules 5 and 6). The set ends 7-6, so a tiebreak enters the score as one game, however many points it runs to.
At the four majors, the Grand Slam Rule Book makes every match outside the men's singles main draw best of three unless a tournament decides otherwise. It also sends a final set at six games all to a 10-point tiebreak: first to ten points, with a two-point margin. The majors adopted that tiebreak together from 2022, so a deciding set there can no longer run to 12-10.
On the men's tour, the 2026 ATP Official Rulebook makes singles best of three tie-break sets, while doubles play a 10-point match tiebreak at one set all. Check whether your bookmaker counts that tiebreak as a game or a set before betting a doubles total or handicap.
Retirements and walkovers
A retirement is a player stopping mid-match, usually through injury or illness, so the opponent goes through. Your bookmaker's terms then settle the bet under one of three common rule types: void unless the match is completed, standing once a set has been completed, or standing as soon as play has started. The NSW Bookmaker Declared Betting Events Betting Rules, for bookmakers authorised in NSW, take the first approach. A match starts with the first serve (clause 5.2.8.1), and if a player then fails to finish it, all single bets on the match are refunded (clause 5.2.8.3).
A walkover is different: the match never starts because one player withdraws, and match bets on it are commonly void. Tennis retirement rules work each rule type through one match.
Online tennis bets close when the match starts
Under the Interactive Gambling Act 2001, any bet on a sporting event that is accepted once the event has begun counts as an in-play bet (s 10B). An online provider may only take sports bets that are not in-play, and only while it holds a licence from an Australian state or territory (s 8A(3), s 15AA). ACMA, the Act's regulator, names in-play sports betting among the services illegal to offer to people in Australia. So every online tennis bet goes on before the match starts, and the in-play betting guide sets out the law in detail.
Most of the tour is played overseas: an 11 am start in Paris in early June (UTC+2) is 7 pm AEST, and in New York in early September (UTC-4) it is 1 am AEST the next day.
How to bet on tennis, step by step
- Check the provider first: ACMA's register of wagering providers lists each licensed operator's trading names, licence holder and website.
- Check the format: best of three or best of five, singles or doubles.
- Read the bookmaker's tennis rules on retirements, walkovers and match tiebreaks before you bet.
- Turn the price into a chance with implied probability = 1 / decimal odds, so $1.33 is 1 / 1.33 = 75.2%, and decide whether you rate the player above that.
- Compare prices, bet before the match starts, and make sure the bet slip shows the price you chose.
- Set a deposit limit with each bookmaker: a decrease applies at once, an increase only after 7 days.
Mistakes that cost money on tennis bets
| Mistake | Cost, using this page's illustrative prices | Fix |
|---|---|---|
| Treating the match winner as a handicap winner | Player A won 6-4 3-6 6-3 and $20 on Player A -4.5 games still lost | Check the margin the handicap needs |
| Ignoring the margin on set betting | $100 returns about $93.92 on average, against $95.60 on the head to head | Know each market's margin |
| Carrying a three-set price into a five-set match | $3.55 on Player B over five sets, fair at $4.25, returns 0.23517 x 3.55 = $0.83 per $1 on average | Price the format you are betting |
Comparing tennis prices across bookmakers
Bookmakers price tennis independently, so one player can be $1.33 at one bookmaker and $1.40 at another (illustrative): $50 returns $66.50 at the first and $70.00 at the second. B337's Terminal lines up prices from 40+ bookmakers across racing and sports, one column each, with the best available price on each selection picked out. Its sports board carries tennis head to head, line and total markets whenever bookmakers have them up.
Prices are collected on a repeating cycle and can trail the bookmaker's own, so confirm the price in your bookmaker account before betting. A free account opens a limited view of the Terminal with live odds; odds comparison explains the board.
Risk: Betting involves risk. Taking the better price does not stop a losing bet from losing, a retirement can turn the bet into a refund or a loss under the bookmaker's own rule, and there is no guarantee of profit. The responsible gambling page has limits and support.