In tennis, spread betting on the ATP Canadian Open revolves around game handicaps — a player is given a positive or negative number of games that gets added to their final game total to determine whether the bet covers. For example, if Jannik Sinner is listed at -5.5 games against a lower-ranked opponent, he needs to win by at least six games across all sets for that spread to cash. This differs fundamentally from team sport spreads because tennis scoring is non-linear; a player can dominate in games won yet still lose a match, or vice versa, making the handicap market uniquely nuanced on hard courts where serving margins tend to be thinner than on grass.
The spreads market becomes most valuable when there's a clear mismatch in quality but the moneyline offers little return. Bettors should focus on surface-specific form, recent fatigue from the summer hard-court swing, and how players perform in early rounds versus later stages when intensity rises. First-round matches at the Canadian Open often produce lopsided scorelines that reward spread bettors who identify motivated top seeds. Regarding vig, tennis game spreads typically carry slightly higher juice than moneylines or over/under totals — standard lines often sit around -115 on each side rather than the -110 baseline — making it especially important to compare pricing across books before placing a wager.
Analysis updated September 6, 2026. Odds data above refreshes hourly.
Cross-Sport spreads Vig Comparison
ATP Canadian Open spreads averages 6.23% vig across 11 sportsbooks. Here's how that compares to other active sports:
| Sport | Avg Vig | vs ATP Canadian Open |
|---|---|---|
| ATP Canadian Open | 6.23% | — |
| ATP China Open | 6.41% | ATP Canadian Open runs 0.18 pts lower |
| ATP Japan Open | 6.09% | ATP Canadian Open runs 0.14 pts higher |
| WTA China Open | 6.59% | ATP Canadian Open runs 0.36 pts lower |
| CFL | 5.11% | ATP Canadian Open runs 1.12 pts higher |
Vig Rankings
Frequently Asked Questions
Which sportsbook has the lowest ATP Canadian Open spreads vig?
Pinnacle currently has the lowest vig at 3.09%, earning a grade of B+.
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.