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.

ATP French Open Spreads Odds Today

Q: Can I still compare sportsbooks for ATP French Open?

No live odds are currently available for ATP French Open. In the meantime, check out our odds comparison page for other available options, or visit our overall Vig Index for cross-sport rankings.

ATP French Open Odds Not Currently Available

ATP French Open does not currently have odds in our data feed. When odds for events are available at sportsbooks they will be listed here. This page updates 3× daily from The Odds API — when sportsbooks begin posting ATP French Open lines, the full analysis will become available.

In the meantime, check out our odds comparison page for other available options.

Not sure which sportsbook is right for you? Try the Sportsbook Selector — answer four questions and get a personalized recommendation backed by live vig data.

The ATP French Open operates on a unique timeline within professional tennis, with the tournament held annually in late May to early June at Roland Garros. Unlike team sports with extended seasons, this Grand Slam event represents a concentrated two-week window where clay court specialists and all-surface players converge on Paris. Preseason futures markets for the French Open typically emerge in January following the Australian Open, with initial outright winner odds posted as players begin their clay court preparation. The clay court season builds momentum through Monte Carlo, Barcelona, and Madrid Masters events in April and early May, providing crucial form indicators that dramatically shift French Open betting lines.

Off-season betting opportunities center heavily on outright tournament winner futures, with books offering enhanced odds on players like Rafael Nadal historically dominating these markets given his 14 French Open titles. Quarter-specific betting allows action on which section of the draw will produce finalists, while "to reach final" and "to reach semifinals" props provide middle-ground options between outright winners and early round exits. Set betting markets examine whether matches will require four or five sets, particularly relevant given clay court's grueling nature and tendency toward longer rallies.

Vig patterns in French Open betting show their loosest margins during early January futures posting, when uncertainty around player fitness and clay court preparation creates wider spreads. Lines tighten considerably following Monte Carlo and Madrid results in April, as these tournaments serve as direct form guides for Roland Garros performance. The biggest odds movements typically stem from injury reports during clay court preparation, with withdrawal announcements causing dramatic line adjustments. Surface-specific performance data drives significant market corrections, as hard court success doesn't always translate to clay court excellence, creating value opportunities for sharp bettors tracking surface-specific metrics and historical clay court performance trends.

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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.