Pinnacle leads with 2.79% vig (A), followed by BetMGM at 3.66%. The spread between #1 and #17 is 4.85% — book choice matters significantly for ATP Madrid Open.

The ATP Madrid Open occupies a distinctive niche in the tennis betting calendar as one of the premier clay-court Masters 1000 events, yet it plays unlike any other clay tournament. Held at an altitude of over 650 meters, Madrid's thinner air causes the ball to fly faster and bounce higher, effectively narrowing the gap between clay specialists and hard-court power players. This creates a uniquely volatile betting environment where upsets are more frequent than at Roland Garros or Rome. The surface plays closer to a fast hard court than traditional clay, which means bettors who blindly back clay-court grinders often find themselves on the wrong side. Market depth is strong for a Masters event — most books offer match winners, set betting, game totals, and in-play markets through the early rounds — but liquidity and prop variety thin out considerably outside the top-half draw.

Vig on Madrid Open matches tends to follow the standard tennis pattern: tighter margins on marquee matchups involving top-10 players, where sportsbooks compete aggressively for volume, and wider margins on first- and second-round matches featuring lower-ranked qualifiers. A typical main-draw match between two seeded players might carry a vig in the 4-6% range, while early-round mismatches can push toward 7-9%. Shopping across multiple books becomes especially valuable during the opening rounds, where pricing discrepancies are most pronounced and a half-point difference in implied probability can meaningfully shift expected value.

The tournament typically runs in late April to early May, falling during a stretch when several clay-court events overlap and sportsbooks are simultaneously pricing Monte Carlo, Barcelona, and Rome. This competitive pressure generally benefits bettors, as books sharpen their lines to attract action during the busiest clay swing of the season. Key factors influencing Madrid odds include player fitness coming off the early clay season, the altitude adjustment (which historically benefits big servers and aggressive baseliners like Alcaraz over pure counterpunchers), and weather — afternoon wind and dry conditions in the Spanish capital can further accelerate play. Recent form on clay matters, but Madrid rewards bettors who weight power metrics and serve data more heavily than traditional clay-court statistics.

Analysis updated September 6, 2026. Odds data above refreshes hourly.

ATP Madrid Open Sportsbook Vig Rankings

# Sportsbook Avg Vig Grade Moneyline 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

Best Line Leaders

Which sportsbook offers the best odds most often across 1 events:

#SportsbookBest Lines
1Pinnacle5
2BetRivers3
3LowVig.ag3
4FanDuel1

Frequently Asked Questions

Which sportsbook has the lowest vig for ATP Madrid Open?

Pinnacle currently has the lowest average vig for ATP Madrid Open at 2.79%, earning a grade of A.

How do sportsbook odds compare for ATP Madrid Open?

We compare 17 sportsbooks for ATP Madrid Open. The vig ranges from 2.79% (Pinnacle) to 7.64% (Caesars).

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.