The ATP Madrid Open occupies a unique spot on the tennis calendar as one of the premier clay-court Masters 1000 events, but with a critical twist: the tournament is played at altitude in Madrid, roughly 650 meters above sea level. This makes the ball fly faster and bounce higher than at other clay events, blurring the line between clay-court and hard-court tennis. For bettors, this creates significant edge opportunities, as casual markets often default to standard clay-court assumptions — favoring grinders and baseliners — while the conditions actually reward big servers and aggressive ball-strikers. Market depth is generally strong for main draw matches, with most books offering match winner, set betting, game handicaps, and over/under totals. However, liquidity thins considerably in qualifying rounds and early-round matches featuring lower-ranked players, where sharper bettors can sometimes find softer lines.
Vig on ATP Madrid Open matches tends to follow the broader tennis market structure: margins on match-winner markets typically range from 4% to 7% at mainstream sportsbooks, though they can tighten to 2-3% at the sharpest books, particularly for marquee quarterfinal and semifinal matchups featuring top-10 players. Early-round matches and prop markets like correct score or set betting generally carry wider margins, sometimes exceeding 8%. Because the tournament draws heavy public interest — especially with Spanish players like Carlos Alcaraz competing — bookmakers sometimes shade lines toward fan favorites, creating value on the other side.
The Madrid Open falls in late April to early May, sitting between Monte Carlo and Rome in the clay-court swing leading into Roland Garros. This timing matters: odds tend to be most competitive during the second week when the field narrows and books have more match data to work with. Key factors shaping the lines include surface transition form — players arriving from hard-court events often struggle early — as well as the altitude's effect on serve-dominant players. Fatigue and scheduling density also play a role, as some top players manage their workload across back-to-back Masters events. Weather in Madrid can swing from cool and windy to hot and dry, directly impacting ball speed and player endurance, making real-time conditions a factor worth monitoring before placing bets.
Cross-Sport Vig Comparison
ATP Madrid Open averages 5.32% vig across 17 sportsbooks. Here's how that compares to other active sports:
| Sport | Avg Vig | vs ATP Madrid Open |
|---|---|---|
| ATP Madrid Open | 5.32% | — |
| CFL | 5.15% | 0.16% higher |
| NCAAF | 4.84% | 0.48% higher |
| NFL | 4.76% | 0.56% higher |
| NFL Preseason | 4.78% | 0.54% higher |
Vig Rankings
| # | Sportsbook | Avg Vig | Grade | ML | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | Pinnacle | 2.79% | A | 2.40% | 2.83% | 3.14% | 1 |
| 2 | BetMGM | 3.66% | B+ | 3.66% | — | — | 1 |
| 3 | LowVig.ag | 3.92% | B+ | 4.00% | 3.63% | 4.14% | 1 |
| 4 | BetOnline.ag | 3.92% | B+ | 4.00% | 3.63% | 4.14% | 1 |
| 5 | FanDuel | 4.23% | B | 4.23% | — | — | 1 |
| 6 | Fanatics | 4.62% | B | 4.62% | — | — | 1 |
| 7 | DraftKings | 4.76% | B | 4.76% | — | — | 1 |
| 8 | 888sport | 5.69% | C+ | 5.69% | — | — | 1 |
| 9 | Hard Rock Bet | 5.71% | C+ | 5.71% | — | — | 1 |
| 10 | theScore Bet (ESPN Bet) | 5.71% | C+ | 5.71% | — | — | 1 |
| 11 | BetRivers | 5.77% | C+ | 5.51% | 5.88% | 5.92% | 1 |
| 12 | betPARX | 5.92% | C+ | 5.51% | 6.35% | 5.92% | 1 |
| 13 | Bally Bet | 5.92% | C+ | 5.51% | 6.35% | 5.92% | 1 |
| 14 | BetUS | 6.54% | C | 5.71% | 6.93% | 6.98% | 1 |
| 15 | Fliff | 6.71% | C | 6.71% | — | — | 1 |
| 16 | BetAnything | 6.88% | C | — | 6.78% | 6.98% | 1 |
| 17 | Caesars | 7.64% | D | 6.55% | 8.05% | 8.33% | 1 |
Frequently Asked Questions
Which sportsbook has the lowest ATP Madrid Open vig?
Pinnacle currently has the lowest vig at 2.79%, earning a grade of A.
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.