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, played annually at the Caja Mágica on outdoor clay courts, presents a distinctive betting landscape shaped by several factors unique to the event. Clay-court tennis naturally produces longer rallies and more breaks of serve, which can make match outcomes less predictable than on faster surfaces. Madrid's high altitude — roughly 650 meters above sea level — adds another layer of complexity, as the thinner air causes the ball to fly faster and bounce higher, partially neutralizing the slow-court advantage that pure clay specialists typically enjoy. This makes Madrid one of the more volatile clay events on the WTA calendar, creating value opportunities for bettors who understand how altitude affects player styles. Market depth is generally strong, with most major sportsbooks offering match winners, set betting, game handicaps, and total games across all rounds.
Vigorish on WTA Madrid Open matches tends to vary meaningfully by round and market type. Early-round matches featuring lower-ranked qualifiers often carry wider margins — sometimes north of 6-8% on match-winner lines — because books have less reliable data and want to protect against sharp action. As the tournament progresses into the quarterfinals and beyond, margins typically compress to the 3-5% range, particularly on headline matches featuring top-ranked players where public interest drives competitive pricing across books. Prop markets and live betting lines generally carry higher embedded vig throughout the tournament, making pre-match moneylines and spreads the most efficient markets to target.
The Madrid Open typically falls in late April or early May, positioned between the Monte Carlo and Rome Masters events during the European clay swing. This timing matters because it sits at a point in the season when player form on clay is still being established, and fitness concerns from the surface transition are common. Bettors should pay close attention to how players performed in the preceding weeks, as clay-court conditioning is cumulative. Withdrawal rates can spike in Madrid as players manage their bodies ahead of Roland Garros, and late scratches can shift odds dramatically. Weather is generally favorable, but occasional wind and temperature drops during evening sessions can alter match dynamics, particularly favoring aggressive, flat-hitting players over heavy topspin baseliners.
Analysis updated September 6, 2026. Odds data above refreshes hourly.
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 every hour, on the hour (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 average vig: A+ (under 2%) is exchange-level pricing, A (2–3%) very competitive, B+ (3–4%) above average, B (4–5%) the industry standard, C+ (5–6%) slightly below average, C (6–7%) below average, D (7–8%) high vig, D− (8–10%) very high, F (10%+) predatory.
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, BetAnything). 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 every hour, on the hour (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.