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.

DraftKings WTA Wuhan Open Odds

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

No live odds are currently available for WTA Wuhan 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 Wuhan Open Odds Not Currently Available

WTA Wuhan 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 Wuhan 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 WTA Wuhan Open traditionally takes place in late September or early October as part of the Asian swing during the WTA Tour's regular season, which runs from January through November. As a Premier 5 event, Wuhan attracts the world's top players before the season-ending WTA Finals in November. Sportsbooks typically release initial tournament winner odds in August when the entry list is confirmed, with draw-based betting opening once the official draw is released approximately one week before play begins. The tournament's position in the calendar makes it a crucial tune-up event for players preparing for the year-end championships, influencing both form and ranking implications that bettors must consider.

Off-season betting opportunities for Wuhan focus primarily on tournament winner futures, with books offering odds on both the singles and doubles champions. Player-specific props include reaching certain rounds (quarterfinals, semifinals, finals) and head-to-head matchups for potential draw scenarios. Unlike team sports, tennis futures revolve around individual player performance metrics such as total titles won during the Asian swing or season-ending rankings. Some books also offer novelty bets on match duration, total games played in the final, or whether the tournament will feature multiple top-10 upsets, which historically occur more frequently during the demanding Asian tour stretch.

Vig patterns for WTA events like Wuhan typically start loose when initial odds are posted in August, as books hedge against uncertainty in player participation and form. The sharpest value often emerges in the 48-72 hours before the tournament begins, when late withdrawals and practice session reports create line movement opportunities. Books tighten margins significantly once main draw play commences, particularly for live betting on featured matches. The biggest odds movements during the off-season stem from player injury reports, coaching changes (especially for top-ranked players), and late tournament entries or withdrawals that reshape the competitive landscape and betting market dynamics.

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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.