Average vig down 0.08% since yesterday. Fliff improved by 0.85%.

7-day trend: Average vig has worsened by 0.94 percentage points over the past week (from 4.95% to 5.89%). Odds margins are widening, meaning bettors are getting less value per wager.

Pinnacle dominates WTA Cincinnati Open with 1.54% less vig than the runner-up LowVig.ag. The spread between #1 and #19 is 5.82% — book choice matters significantly for WTA Cincinnati Open. Vig is trending down 0.08% since yesterday.

The WTA Cincinnati Open, officially the Western & Southern Open, occupies a critical slot on the tennis calendar as a WTA 1000 event held in the week before the US Open. For bettors, this creates a distinctive landscape: the tournament draws elite fields competing on hard courts in Mason, Ohio, but players are often managing their physical loads and form trajectories with the final Grand Slam just days away. Match-level markets — moneyline, set betting, and game totals — tend to offer solid depth given the tournament's prestige, though in-play markets can shift dramatically due to the best-of-three-set format, where a single break of serve can flip an entire match. The compressed format means upsets happen frequently, and early-round matchups between top seeds and dangerous qualifiers often present value opportunities.

Vigorish on WTA Cincinnati matches typically runs moderate compared to WTA 250-level events, where books sometimes inflate margins on less-followed matches. Because the Cincinnati field attracts significant betting volume — particularly on marquee matchups involving top-10 players — sportsbooks compete more aggressively on pricing, which pushes margins tighter on headline matches. However, bettors should be cautious with early-round lines featuring lesser-known opponents, where vig can widen noticeably as books hedge against thinner information. Comparing across multiple sportsbooks is especially worthwhile here, as the spread between the sharpest and softest lines on the same WTA match can represent meaningful edge.

The tournament typically falls in mid-August, landing during a stretch where the hard-court swing generates peak tennis betting activity. Outdoor conditions in Ohio — heat, humidity, and occasional rain delays — are genuine factors that affect match dynamics, particularly for players less accustomed to physically demanding conditions. Surface form matters enormously; players coming off strong results in Toronto (the preceding WTA 1000 event) often carry momentum, while others may be deliberately pacing themselves. Fitness news and withdrawal updates are essential to monitor, as late scratches frequently reshape draw sections and shift futures odds significantly in the days before play begins.

WTA Cincinnati Open Sportsbook Vig Rankings

# Sportsbook Avg Vig Grade 24h Moneyline Spreads Totals Events
1 Pinnacle 2.83% A 0.34% 2.69% 2.93% 2.87% 8
2 LowVig.ag 4.37% B 0.01% 4.00% 4.60% 4.53% 8
3 BetOnline.ag 4.37% B 0.01% 4.00% 4.60% 4.53% 8
4 FanDuel 4.45% B 0.09% 4.45% 11
5 DraftKings 4.80% B 0.12% 4.80% 11
6 Fanatics 5.17% C+ 5.17% 12
7 888sport 5.37% C+ 0.43% 5.37% 11
8 Hard Rock Bet 5.51% C+ 0.12% 5.51% 9
9 BetMGM 5.94% C+ 0.22% 5.94% 11
10 Bovada 6.08% C 0.03% 4.57% 6.89% 6.85% 11
11 BetUS 6.21% C 0.27% 5.36% 6.69% 6.66% 8
12 BetAnything 6.34% C 0.03% 5.30% 6.86% 6.92% 8
13 BetRivers 6.71% C 0.03% 5.46% 7.35% 7.32% 9
14 Bally Bet 6.76% C 0.14% 5.46% 7.44% 7.39% 9
15 betPARX 6.76% C 0.10% 5.46% 7.44% 7.39% 9
16 Fliff 6.76% C 0.85% 6.76% 1
17 theScore Bet (ESPN Bet) 6.77% C 0.23% 6.77% 12
18 Caesars 8.03% D- 0.12% 6.78% 8.87% 8.92% 11
19 ReBet 8.65% D- 0.47% 8.48% 8.97% 8.54% 12

Upcoming Events

MatchupTimeCoverage
Madison Keys @ Katerina SiniakovaAug 18, 3:00 PM19 books
Mirra Andreeva @ Janice TjenAug 18, 4:00 PM18 books
Elina Svitolina @ Xiyu WangAug 18, 6:00 PM18 books
Ann Li @ Coco GauffAug 18, 7:00 PM18 books
Sloane Stephens @ Marta KostyukAug 18, 7:00 PM18 books

Best Line Leaders

Which sportsbook offers the best odds most often across 12 events:

#SportsbookBest Lines
1Pinnacle37
2Bally Bet12
3BetRivers11
4LowVig.ag11
5Bovada6
6FanDuel4
7betPARX3
8ReBet3
9BetOnline.ag3
10Fanatics3
11theScore Bet (ESPN Bet)2
12888sport2
13Hard Rock Bet1
14Caesars1
15BetMGM1

Frequently Asked Questions

Which sportsbook has the lowest vig for WTA Cincinnati Open?

Pinnacle currently has the lowest average vig for WTA Cincinnati Open at 2.83%, earning a grade of A.

How do sportsbook odds compare for WTA Cincinnati Open?

We compare 19 sportsbooks for WTA Cincinnati Open. The vig ranges from 2.83% (Pinnacle) to 8.65% (ReBet).

Is WTA Cincinnati Open vig getting better or worse?

WTA Cincinnati Open vig is currently improving (decreasing). Average vig has shifted by 0.08 percentage points since yesterday. We track these changes daily to help bettors identify the best windows for placing wagers.

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.

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.