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.

MyBookie.ag ATP Italian Open Odds

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

No live odds are currently available for ATP Italian 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 Italian Open Odds Not Currently Available

ATP Italian 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 Italian 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 Italian Open follows a precise annual calendar, with the tournament typically held in mid-May as part of the European clay court swing leading into Roland Garros. The Rome Masters 1000 event runs for approximately ten days, usually spanning the second and third weeks of May, making it one of the most crucial preparation tournaments for the French Open. Preseason futures markets for the Italian Open generally open in late February or early March, coinciding with the start of the clay court season in South America, while immediate pre-tournament odds crystallize during the week leading up to the event as players confirm their participation and reveal their clay court form.

Off-season betting opportunities for the Italian Open center heavily on outright winner futures, which offer the most liquid market during the tournament's dormant period. Bettors can find value in set betting futures for specific player matchups, clay court specialist props, and head-to-head season series between top players who historically meet in Rome. Quarter-specific betting becomes particularly relevant given the tournament's unique draw structure, where seeded players can face challenging paths through sections dominated by clay court specialists. The Italian Open's position as the final major tune-up before Roland Garros creates interesting derivative markets linking performance in Rome to French Open odds adjustments.

Vig patterns for Italian Open futures typically show the loosest margins during the off-season months of December through February, when recreational interest is minimal and books are less concerned with balancing action. The most significant odds movements historically occur following the Miami Open in late March, when players begin declaring their clay court schedules, and after Monte Carlo and Madrid results in April, which provide direct form indicators. Clay court injury reports and training camp updates from players' European bases in Monte Carlo or Barcelona frequently trigger sharp line movements, as do coaching changes announced during the off-season that specifically target clay court preparation and tactics.

In-Season Sports

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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.