A moneyline bet on the WTA Italian Open is the most straightforward wager available: pick the player who will win the match outright, with no point spreads or game handicaps involved. Unlike team sports where moneyline pricing can swing dramatically based on perceived mismatches, tennis moneylines at a clay-court event like the Internazionali BNL d'Italia carry unique dynamics. Clay tends to narrow the gap between favorites and underdogs, as the slower surface allows lower-ranked players to extend rallies and stay competitive. This makes early-round moneyline underdogs particularly interesting, especially when a big server or aggressive baseliner draws a clay specialist who may be undervalued by the market.
Bettors should pay close attention to recent clay-court form, fatigue from the spring swing leading into Rome, and how players handle the best-of-three-set format under warm conditions. The moneyline market in WTA tennis generally carries slightly higher vig than game spreads or totals, largely because it attracts the heaviest recreational action. Lopsided matchups in early rounds tend to see inflated juice on heavy favorites, meaning bettors searching for value should compare pricing across books carefully — even small differences in vig on a -350 favorite can meaningfully impact long-term profitability.
Analysis updated September 20, 2026. Odds data above refreshes hourly.
Cross-Sport moneyline Vig Comparison
WTA Italian Open moneyline averages 5.10% vig across 18 sportsbooks. Here's how that compares to other active sports:
| Sport | Avg Vig | vs WTA Italian Open |
|---|---|---|
| WTA Italian Open | 5.10% | — |
| ATP China Open | 5.19% | WTA Italian Open runs 0.09 pts lower |
| ATP Japan Open | 5.06% | WTA Italian Open runs 0.04 pts higher |
| WTA China Open | 5.25% | WTA Italian Open runs 0.15 pts lower |
| CFL | 4.78% | WTA Italian Open runs 0.32 pts higher |
Vig Rankings
| # | Sportsbook | Vig | Grade | Events |
|---|---|---|---|---|
| 1 | Pinnacle | 2.47% | A | 1 |
| 2 | BetOnline.ag | 3.89% | B+ | 1 |
| 3 | LowVig.ag | 3.89% | B+ | 1 |
| 4 | BetMGM | 4.44% | B | 1 |
| 5 | FanDuel | 4.72% | B | 1 |
| 6 | DraftKings | 4.76% | B | 1 |
| 7 | theScore Bet (ESPN Bet) | 5.02% | C+ | 1 |
| 8 | Fanatics | 5.23% | C+ | 1 |
| 9 | Hard Rock Bet | 5.23% | C+ | 1 |
| 10 | BetAnything | 5.27% | C+ | 1 |
| 11 | 888sport | 5.45% | C+ | 1 |
| 12 | BetUS | 5.45% | C+ | 1 |
| 13 | BetRivers | 5.53% | C+ | 1 |
| 14 | betPARX | 5.53% | C+ | 1 |
| 15 | Bally Bet | 5.53% | C+ | 1 |
| 16 | ReBet | 6.03% | C | 1 |
| 17 | Caesars | 6.44% | C | 1 |
| 18 | Fliff | 6.99% | C | 1 |
Frequently Asked Questions
Which sportsbook has the lowest WTA Italian Open moneyline vig?
Pinnacle currently has the lowest vig at 2.47%, earning a grade of A.
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 every hour, on the hour (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 average vig: A+ (under 2%) is exchange-level pricing, A (2–3%) very competitive, B+ (3–4%) above average, B (4–5%) the industry standard, C+ (5–6%) slightly below average, C (6–7%) below average, D (7–8%) high vig, D− (8–10%) very high, F (10%+) predatory.
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, BetAnything). 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 every hour, on the hour (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.