Pinnacle dominates WTA Madrid Open with 1.26% less vig than the runner-up BetOnline.ag. The spread between #1 and #19 is 5.29% — book choice matters significantly for WTA Madrid Open.
The WTA Madrid Open occupies a distinctive niche in the tennis betting calendar as a clay-court Premier Mandatory event, meaning the strongest field outside of Grand Slams is virtually guaranteed. For bettors, clay-court tennis introduces specific dynamics that differentiate it from hard-court or grass events: longer rallies, more physical attrition, and a surface that historically favors baseline grinders and players with heavy topspin. The altitude in Madrid adds a critical wrinkle — the ball flies faster and sits up higher at roughly 650 meters above sea level, which means big servers and aggressive ball-strikers perform better here than at other clay events like Rome or Roland Garros. This creates pricing inefficiencies when books lean too heavily on generic clay-court form without adjusting for Madrid's unique conditions.
Vig on WTA Madrid Open match markets tends to sit in the moderate range, typically between 4% and 7% on standard moneyline bets, though this varies considerably by sportsbook and round. Early-round matches featuring lower-ranked qualifiers often carry wider margins because books have less data and liquidity to work with, while quarterfinal and semifinal matchups between well-known players tend to see tighter lines as sharp money enters the market. Set betting, game handicaps, and total games markets generally carry higher vig, sometimes exceeding 8%, making line shopping across multiple books particularly valuable for those secondary markets.
The tournament typically runs in late April to early May, falling during a stretch of the clay-court swing where player fitness and scheduling choices heavily influence outcomes. Bettors should monitor who played Barcelona or Stuttgart the week prior, as fatigue and minor injuries accumulated on clay can be decisive. Weather in Madrid can shift between warm, dry conditions and cooler, windier days that slow the court down, meaningfully altering matchup dynamics. Players transitioning from hard-court seasons or those returning from injury layoffs frequently underperform their rankings on this surface, creating opportunities for bettors who track surface-specific form rather than relying solely on headline results.
WTA Madrid Open Sportsbook Vig Rankings
| # | Sportsbook | Avg Vig | Grade | Moneyline | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | Pinnacle | 2.76% | A | 2.37% | 2.88% | 3.05% | 1 |
| 2 | BetOnline.ag | 4.02% | B | 4.03% | 4.05% | 3.98% | 1 |
| 3 | LowVig.ag | 4.02% | B | 4.03% | 4.05% | 3.98% | 1 |
| 4 | theScore Bet (ESPN Bet) | 4.44% | B | 4.44% | — | — | 1 |
| 5 | BetMGM | 4.64% | B | 4.64% | — | — | 1 |
| 6 | FanDuel | 4.72% | B | 4.72% | — | — | 1 |
| 7 | DraftKings | 4.88% | B | 4.88% | — | — | 1 |
| 8 | Fanatics | 5.23% | C+ | 5.23% | — | — | 1 |
| 9 | Hard Rock Bet | 5.23% | C+ | 5.23% | — | — | 1 |
| 10 | 888sport | 5.45% | C+ | 5.45% | — | — | 1 |
| 11 | betPARX | 5.97% | C+ | 5.53% | 6.07% | 6.29% | 1 |
| 12 | Bally Bet | 5.97% | C+ | 5.53% | 6.07% | 6.29% | 1 |
| 13 | BetRivers | 5.97% | C+ | 5.53% | 6.07% | 6.29% | 1 |
| 14 | Bovada | 6.05% | C | 4.44% | 6.93% | 6.78% | 1 |
| 15 | BetUS | 6.39% | C | 5.45% | 6.93% | 6.78% | 1 |
| 16 | BetAnything | 6.98% | C | — | — | 6.98% | 1 |
| 17 | ReBet | 7.36% | D | 5.83% | 8.26% | 7.98% | 1 |
| 18 | Caesars | 7.80% | D | 5.45% | 9.04% | 8.90% | 1 |
| 19 | Fliff | 8.05% | D- | 8.05% | — | — | 1 |
Best Line Leaders
Which sportsbook offers the best odds most often across 1 events:
| # | Sportsbook | Best Lines |
|---|---|---|
| 1 | Pinnacle | 6 |
| 2 | betPARX | 4 |
| 3 | BetOnline.ag | 2 |
Frequently Asked Questions
Which sportsbook has the lowest vig for WTA Madrid Open?
Pinnacle currently has the lowest average vig for WTA Madrid Open at 2.76%, earning a grade of A.
How do sportsbook odds compare for WTA Madrid Open?
We compare 19 sportsbooks for WTA Madrid Open. The vig ranges from 2.76% (Pinnacle) to 8.05% (Fliff).
What is vig (vigorish) in sports betting?
Vig — short for vigorish, also called juice or overround — is the margin a sportsbook builds into its odds. It's the difference between the true probability of an outcome and what the odds imply. Lower vig means you keep more of your winnings on every bet. For example, a standard -110/-110 line has about 4.76% vig.
How often is this data updated?
We pull fresh odds from The Odds API three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds. The timestamp at the top of the page shows the most recent refresh.
How is the vig grade calculated?
Each sportsbook is graded on a letter scale based on average vig: A+ (under 2%) is exceptional, A (2–3%) is excellent, B+ (3–4%) is above average, B (4–5%) is the industry standard, C (5–6%) is below average, and D (above 6%) indicates high-juice markets.
Why does lower vig matter for bettors?
Lower vig directly impacts your long-term returns. A bettor placing $1,000 per week at a book with 4% vig loses roughly $40/week to the house edge. At 2% vig, that drops to $20/week — a $1,040 difference over a year. For serious bettors, shopping for lower vig is one of the most reliable ways to improve profitability.
What sportsbooks do you track?
We track both regulated US sportsbooks (DraftKings, FanDuel, BetMGM, Caesars) and offshore books (Bovada, BetOnline, MyBookie, BetUS, LowVig.ag, BetAnySports). Data comes from The Odds API, which aggregates real-time lines from licensed sources.
How We Calculate These Numbers
- Data Source
- All odds on this page come from The Odds API, which aggregates real-time lines from licensed US and offshore sportsbooks. We track moneyline, spread, and totals markets across every sport with active betting lines.
- Update Frequency
- We pull a fresh snapshot of every tracked market three times per day — at 6:00 AM, 2:00 PM, and 10:00 PM UTC. Each snapshot captures the latest lines from every sportsbook that has posted odds for a given event. The timestamp at the top of each page tells you exactly when the data was last refreshed.
- Vig Calculation
- Vig (short for vigorish, also called juice or overround) measures the margin a sportsbook builds into its odds. We calculate it by converting the odds on each side of a market to implied probabilities, summing those probabilities, and subtracting 100%. For example, a market priced at -110/-110 implies 52.38% on each side — a total of 104.76%, meaning a vig of 4.76%. Lower vig means better value for bettors because you keep more of your winnings.
- Per-Market Breakdown
- We compute vig separately for each market type: moneyline (h2h), point spreads, and totals (over/under). The "average vig" shown for each sportsbook is the mean across all market types weighted by the number of events sampled in each market.
- Grading Scale
- Every sportsbook receives a letter grade based on its average vig: A+ (under 2%) is exchange-level pricing. A (2–3%) is very competitive. B+ (3–4%) is above average. B (4–5%) is the industry standard — a -110/-110 line is 4.76%. C+ (5–6%) is slightly below average. C (6–7%) is below average. D (7–8%) is high vig. D− (8–10%) is very high vig. F (10%+) is predatory pricing. See the full Vig Index Methodology for formulas, worked examples, and known limitations.
- Trend Tracking
- We store daily snapshots for 30 days, allowing us to show 24-hour and 7-day vig trends. A downward trend (improving) means sportsbooks are tightening their lines — often in response to increased competition or higher betting volume as a season heats up.