The ATP Canadian Open, alternating annually between Montreal and Toronto as part of the Masters 1000 series, presents a compelling betting landscape due to its position in the calendar and the quality of the draw it attracts. As a mandatory event for top-ranked players, the field is stacked, which creates deep and liquid betting markets across match winners, set spreads, totals, and futures. The hard-court surface produces relatively predictable outcomes compared to clay or grass, but the outdoor conditions in August — including humidity, wind, and occasional rain delays — introduce enough variance to keep lines interesting. Bettors benefit from robust head-to-head data among elite players, but early rounds featuring qualifiers and lower-ranked opponents can produce thinner markets with less reliable pricing.
Vig on ATP Canadian Open markets tends to sit in the moderate range for tennis — tighter than lower-tier ATP 250 events but slightly wider than Grand Slam matches, where massive betting volume drives sportsbooks to compete more aggressively on margins. For marquee matchups involving top-10 players, expect moneyline vig in the 4-6% range across major books, while early-round matches or prop markets can see margins climb toward 7-8%. The best value typically emerges as the tournament progresses into the quarterfinals and beyond, when books sharpen their lines to attract action on high-profile contests.
Seasonal context matters significantly for this event. Falling in early August, the Canadian Open serves as a critical tune-up for the US Open, meaning player form and fitness are under intense scrutiny. Some top seeds arrive underprepared after light summer schedules, while others carry fatigue from the clay-court season and Wimbledon. Surface transition is a major factor — players coming off extended clay or grass campaigns may struggle to adjust their timing on hard courts. The altitude difference between Montreal and Toronto is negligible, but court speed and ball bounce can vary by venue, rewarding bettors who track location-specific performance data.
↓ 7-day trend: ATP Canadian Open average vig has improved by 0.38 percentage points over the past week (from 5.69% to 5.30%). Sportsbooks are tightening their lines — a good sign for bettors.
Cross-Sport Vig Comparison
ATP Canadian Open averages 5.30% vig across 19 sportsbooks. Here's how that compares to other active sports:
| Sport | Avg Vig | vs ATP Canadian Open |
|---|---|---|
| ATP Canadian Open | 5.30% | — |
| CFL | 5.15% | 0.15% higher |
| NCAAF | 4.84% | 0.46% higher |
| NFL | 4.76% | 0.54% higher |
| NFL Preseason | 4.78% | 0.53% higher |
Vig Rankings
| # | Sportsbook | Avg Vig | Grade | ML | Spreads | Totals | Events |
|---|---|---|---|---|---|---|---|
| 1 | Pinnacle | 2.82% | A | 2.49% | 3.09% | 2.89% | 1 |
| 2 | BetMGM | 3.71% | B+ | 3.71% | — | — | 1 |
| 3 | LowVig.ag | 3.92% | B+ | 3.71% | 4.05% | 3.98% | 1 |
| 4 | BetOnline.ag | 3.92% | B+ | 3.71% | 4.05% | 3.98% | 1 |
| 5 | Hard Rock Bet | 4.11% | B | 4.11% | — | — | 1 |
| 6 | theScore Bet (ESPN Bet) | 4.18% | B | 4.18% | — | — | 1 |
| 7 | FanDuel | 4.49% | B | 4.49% | — | — | 1 |
| 8 | Fanatics | 4.78% | B | 4.78% | — | — | 1 |
| 9 | DraftKings | 4.83% | B | 4.83% | — | — | 1 |
| 10 | Bovada | 5.48% | C+ | 3.00% | 6.52% | 6.93% | 1 |
| 11 | 888sport | 5.59% | C+ | 5.59% | — | — | 1 |
| 12 | betPARX | 5.91% | C+ | 4.62% | 6.71% | 6.41% | 1 |
| 13 | Bally Bet | 5.91% | C+ | 4.62% | 6.71% | 6.41% | 1 |
| 14 | BetAnything | 5.97% | C+ | 4.46% | 6.52% | 6.93% | 1 |
| 15 | BetRivers | 5.99% | C+ | 4.62% | 6.70% | 6.65% | 1 |
| 16 | BetUS | 6.07% | C | 4.32% | 6.93% | 6.98% | 1 |
| 17 | ReBet | 7.35% | D | 5.86% | 8.26% | 7.94% | 1 |
| 18 | Fliff | 7.38% | D | 7.38% | — | — | 1 |
| 19 | Caesars | 8.35% | D- | 6.95% | 9.04% | 9.04% | 1 |
Frequently Asked Questions
Which sportsbook has the lowest ATP Canadian Open vig?
Pinnacle currently has the lowest vig at 2.82%, 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 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.