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.

Best WTA Cincinnati Open Odds Today

Q: Can I still compare sportsbooks for WTA Cincinnati Open?

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

WTA Cincinnati Open Odds Not Currently Available

WTA Cincinnati 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 WTA Cincinnati Open lines, the full analysis will become available.

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

The WTA Cincinnati Open operates within the compressed summer hard court season, typically held in mid-August as a Premier 5 event serving as the final major tune-up before the US Open. The tournament window is remarkably narrow compared to other professional sports, with the event running for just one week annually. Sportsbooks generally release futures odds for the Cincinnati Open in early July, shortly after Wimbledon concludes and the hard court swing begins. The tournament's positioning as the penultimate event before the year's final Grand Slam creates unique betting dynamics, as player form and injury status can shift dramatically in the preceding weeks.

Off-season betting opportunities for the Cincinnati Open center primarily on outright winner markets and first-round matchup specials that emerge once the draw is released, typically 4-5 days before play begins. Unlike team sports, tennis futures focus on individual champion odds, with books offering enhanced payouts on dark horse winners and same-game parlays combining match results with set betting. The tournament's Premier 5 status attracts virtually all top-20 players, making the winner's market highly competitive. Books also offer specialized props around American player performance, given Cincinnati's strong domestic following, and weather-delay markets due to the tournament's history of rain interruptions.

Vig patterns in Cincinnati Open betting remain relatively consistent due to the short betting window, though the sharpest lines typically appear 24-48 hours before first-round matches when recreational money floods in. The tournament's proximity to the US Open creates looser early-week lines as books account for potential withdrawals and fitness concerns. Weather-related postponements historically drive the most significant in-tournament odds movements, as indoor court advantages can completely alter match dynamics. Player withdrawal announcements, particularly from seeded competitors dealing with minor injuries sustained during the preceding Toronto/Montreal events, create immediate line adjustments that sharp bettors monitor closely in the days leading up to play.

In-Season Sports

These sports have active odds right now:

Browse by Sportsbook

Browse WTA Cincinnati Open Pages

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.