How tennis betting works
Tennis is one of the simplest sports to bet on because there are no draws: every match ends with one winner. Most sportsbooks in the Philippines show odds in decimal format, where the number is your total return per ₱1 staked, including your stake.
Match winner. This is the main market: you pick which player wins the match. If a player is priced at 1.40, a ₱500 bet returns ₱700 (₱200 profit plus your ₱500 stake). The underdog in the same match might be priced at 3.00, so a ₱500 bet returns ₱1,500.
The bookmaker’s margin. You can see the site’s built-in margin by converting odds to percentages. At 1.40 and 3.00, the implied chances are 71.4% and 33.3%, which add up to 104.8%. The extra 4.8% is the sportsbook’s margin. It works out to about 4.5% of the money bet on the match, and it’s how the site earns money whichever player wins. A lower total means better value for bettors, so compare the same match across sites.
Set betting. Here you bet on the exact final score in sets. A best-of-three match has four possible results (2–0, 2–1, 1–2 or 0–2), while a best-of-five match has six (3–0, 3–1, 3–2 and the reverse). With more possible outcomes, each one has higher odds but is less likely to happen.
Game handicaps. A handicap evens out a mismatch by giving one player a head start in games. If you back a player at −3.5 games, they must win at least four more games than their opponent across the match. A 6–3, 6–4 win is 12 games to 7, a five-game margin, so that bet wins. A 7–5, 6–4 win is only a four-game margin, which also wins, but a 6–4, 7–6 win is a three-game margin and loses. The half-game removes the chance of a tie.
Total games. You bet on whether the match will have more or fewer games than a line set by the sportsbook, such as over or under 22.5 games. Who wins doesn’t matter.
Best-of-three vs. best-of-five. At Grand Slams, men play best-of-five sets, while women play best-of-three. All other ATP and WTA tour events are best-of-three for both. Longer matches leave more time for the stronger player’s edge to show, so favorites are usually priced shorter in best-of-five matches. They also produce higher game totals and wider handicap lines.
Betting on Grand Slams vs tour events
Market depth. The four Grand Slams (Australian Open, French Open, Wimbledon and US Open) attract the most betting. Sportsbooks usually offer more markets on these matches, including set scores, exact game totals, player specials and tournament outright winners. Lower-level tour events, Challengers and early qualifying rounds often have only a few markets, such as match winner and handicap.
How odds compare. Busier matches often carry lower margins, because sportsbooks compete harder for the most-watched events. Smaller events may have higher margins and lower maximum stakes. Calculating the margin for the same match at different sites is the simplest way to compare value.
Tiebreak rules. Since 2022, all four Grand Slams use a 10-point tiebreak if the final set reaches 6–6. Tour events use a standard tiebreak at 6–6 in each set, and doubles usually uses a 10-point match tiebreak instead of a third set. These rules affect total games and set score markets, so check the format before betting.
Clay, grass and hard courts. The surface changes how matches play out, and sportsbooks price that in:
- Clay (e.g., the French Open) is the slowest surface, with a high bounce. Rallies are longer, and players break serve more often, so set scores and game totals can vary more.
- Grass (e.g., Wimbledon) is the fastest surface, with a low bounce. It favors strong servers, so players hold serve more often and tiebreaks are more common.
- Hard courts (e.g., the Australian and US Open) sit in between and are used for most of the tour calendar.
A player’s results on one surface don’t always carry over to another, which is why odds for the same two players can differ by surface.
Live tennis betting
Point-by-point odds. Live (in-play) betting lets you bet while a match is under way. Odds update after almost every point, and markets are often available for the next game, the next set, or the score in the current game. Tennis has short breaks between points, so prices move quickly.
Bet delays and suspensions. Most sites add a short delay, usually a few seconds, before accepting a live bet. During that time the odds can change and your bet may be rejected or offered at a new price. Markets are also suspended during key moments such as break points or medical timeouts. If your stream runs behind the live action, you’re betting on information that is already out of date.
Retirement rules. If a player retires injured mid-match, what happens to your bet depends on the sportsbook. Common rules include:
| Rule | What happens if a player retires |
|---|---|
| One set completed | Bet stands if at least one full set was played; otherwise void |
| Match started | Bet stands once the first ball is served; the player who advances wins |
| Match completed | Bet is void unless the match finishes |
Bets on markets already settled, such as a completed first set, usually stand under all three rules. Since retirements happen more often in tennis than in many other sports, check the rule before betting.
Cash-out. Many sportsbooks let you settle a bet early for a set amount before the match ends. The cash-out offer includes the sportsbook’s margin, so it’s usually a bit less than the bet’s fair value at that moment. Cash-out may also be unavailable while a market is suspended.
What to check before you bet
- The sportsbook is on PAGCOR’s list of licensed sites.
- You know its rule if a player retires mid-match.
- You understand the bet type and the odds format.
- You’ve set a deposit limit before the match.