The top 2 books are tightly clustered — only 0.30% separates them. The spread between #1 and #13 is 5.72% — book choice matters significantly for ATP Monte-Carlo Masters.
The ATP Monte-Carlo Masters occupies a unique position in the tennis betting calendar as the traditional curtain-raiser to the European clay-court swing. Played on outdoor clay at the Monte-Carlo Country Club, this Masters 1000 event draws elite-level fields and generates deep betting markets across match winners, set betting, game totals, and handicap lines. Clay-court tennis tends to produce longer rallies, more breaks of serve, and fewer service aces, which often translates to tighter matches and more predictable scoring patterns compared to faster surfaces. For bettors, this means over/under game totals and set handicaps can offer consistent value, particularly when two baseline-heavy players meet in early rounds.
Vig on Monte-Carlo matches varies significantly depending on the round and profile of the match. Early-round contests featuring lower-ranked qualifiers against top seeds tend to carry wider margins, sometimes exceeding 6-7%, because bookmakers have less confidence in their pricing and adjust accordingly. As the tournament progresses into the quarterfinals and beyond, margins typically tighten to the 3-5% range, reflecting sharper market action and greater liquidity. Comparing vig across sportsbooks becomes especially valuable in this event, where even a point or two of margin difference on a heavy favorite can meaningfully impact expected returns over a week-long tournament.
The tournament typically runs in mid-April, and odds tend to be most competitive once draw-specific information is fully priced in — usually 24-48 hours before each round begins. Key factors that move Monte-Carlo lines include surface-specific form (a player's recent clay results matter far more than hard-court ranking), fatigue from the preceding North American hard-court stretch, and weather conditions, since rain delays and cool temperatures in Monaco can slow the courts further and shift dynamics toward defensive players. Injury disclosures, particularly involving knees and ankles that absorb extra punishment on clay, are critical to monitor, as withdrawal rates at this stage of the season tend to be elevated after the surface transition.
ATP Monte-Carlo Masters Sportsbook Vig Rankings
| # | Sportsbook | Avg Vig | Grade | Moneyline | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | Pinnacle | 3.84% | B+ | 3.84% | — | — | 1 |
| 2 | Hard Rock Bet | 4.14% | B | 4.14% | — | — | 1 |
| 3 | DraftKings | 4.77% | B | 4.77% | — | — | 1 |
| 4 | FanDuel | 4.84% | B | 4.84% | — | — | 1 |
| 5 | betPARX | 5.91% | C+ | 4.79% | 6.41% | 6.54% | 1 |
| 6 | theScore Bet (ESPN Bet) | 5.99% | C+ | 5.99% | — | — | 1 |
| 7 | Bovada | 6.15% | C | 4.55% | 6.93% | 6.98% | 1 |
| 8 | BetRivers | 7.21% | D | 6.30% | 7.48% | 7.83% | 1 |
| 9 | 888sport | 7.40% | D | 7.40% | — | — | 1 |
| 10 | BetMGM | 7.47% | D | 7.47% | — | — | 1 |
| 11 | Fanatics | 8.05% | D- | 8.05% | — | — | 1 |
| 12 | Caesars | 8.25% | D- | 6.67% | 9.04% | 9.04% | 1 |
| 13 | Fliff | 9.56% | D- | 9.56% | — | — | 1 |
Best Line Leaders
Which sportsbook offers the best odds most often across 1 events:
| # | Sportsbook | Best Lines |
|---|---|---|
| 1 | betPARX | 4 |
| 2 | theScore Bet (ESPN Bet) | 1 |
| 3 | Pinnacle | 1 |
Frequently Asked Questions
Which sportsbook has the lowest vig for ATP Monte-Carlo Masters?
Pinnacle currently has the lowest average vig for ATP Monte-Carlo Masters at 3.84%, earning a grade of B+.
How do sportsbook odds compare for ATP Monte-Carlo Masters?
We compare 13 sportsbooks for ATP Monte-Carlo Masters. The vig ranges from 3.84% (Pinnacle) to 9.56% (Fliff).
When do small vig differences matter for ATP Monte-Carlo Masters?
The top two books (Pinnacle and Hard Rock Bet) are separated by just 0.30%. While small, this adds up over volume — a bettor placing $1,000/week saves roughly $3 per week by choosing the lower-vig book.
What is the Monte Carlo Masters?
The Monte-Carlo Masters is an ATP Masters 1000 clay-court tennis tournament held annually in April in Roquebrune-Cap-Martin, France. It is one of the most prestigious clay-court events and traditionally marks the start of the European clay season leading into Roland Garros.
How does clay-court tennis affect betting odds?
Clay-court specialists can significantly outperform their rankings on slow surfaces, which creates pricing inefficiencies. Sportsbooks may undervalue clay-court experts and overvalue hard-court players transitioning to clay. This surface transition period often produces the best value for informed bettors.
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.