The WTA China Open, held annually in Beijing as a prestigious WTA 1000 event, presents a compelling betting market due to the volatile nature of women's tennis. Unlike men's best-of-five formats at Grand Slams, the WTA's best-of-two-sets structure means upsets occur with greater frequency, creating value opportunities for sharp bettors who understand matchup dynamics. Market depth for the China Open is generally strong given its top-tier tournament status — moneylines, set betting, game totals, and prop markets are widely available at major sportsbooks. However, liquidity tends to thin out considerably in early rounds when lesser-known qualifiers face seeded players, which directly impacts how aggressively books shade their lines.

Vig on WTA China Open markets tends to run moderately wide compared to ATP equivalents, largely because the perceived unpredictability of the women's game leads sportsbooks to build in extra margin as a hedge against variance. For marquee matches involving top-10 players, margins typically tighten to the 4-6% range across competitive books, but early-round matchups featuring unranked or qualifying-round players can see vig climb to 7-9% or higher. Bettors comparing odds across multiple sportsbooks can often shave significant margin, particularly on these less prominent matches where pricing discrepancies between books are most pronounced.

The China Open typically takes place in late September or early October, falling during a critical stretch of the WTA season when players are either pushing for WTA Finals qualification or managing accumulated fatigue and injuries from a long campaign. This timing is a key factor bettors should weigh — motivation levels vary wildly, and late-season withdrawals or underperformances from fatigued stars are common. Beijing's outdoor hard courts and occasionally humid conditions can also influence play styles, favoring aggressive baseliners who can dictate points quickly. Surface form from the preceding North American and Asian hard-court swing provides useful predictive data, and bettors who track recent head-to-head records and performance on similar court speeds will find edges that casual markets often overlook.

Analysis updated September 6, 2026. Odds data above refreshes hourly.

Ann Li @ Ashlyn Krueger

Fri, Oct 2, 11:00 PM EDT

Best moneyline price: Ashlyn Krueger +125 at Hard Rock Bet; Ann Li -132 at Pinnacle.

SideMarketBest LineWorst
Ashlyn Krueger Moneyline Hard Rock Bet: +125 +105
Ann Li Moneyline Pinnacle: -132 -155
Ashlyn Krueger +1.5 Spread Pinnacle: -105 -111
Ann Li -1.5 Spread Pinnacle: -109 -125
Over 21.5 Total BetRivers: -129 -135
Under 21.5 Total ReBet: -102 -105
Ashlyn Krueger +0.5 Spread Bally Bet: +114 +114
Ann Li -0.5 Spread Bally Bet: -152 -152
Over 22.5 Total LowVig.ag: +110 +100
Under 22.5 Total LowVig.ag: -130 -134
Ashlyn Krueger +2.5 Spread BetRivers: -120 -130
Ann Li -2.5 Spread Caesars: -110 -112
Over 22 Total Pinnacle: -107 -115
Under 22 Total Pinnacle: -107 -115

Maria Camila Osorio Serrano @ Coco Gauff

Fri, Oct 2, 11:00 PM EDT

Best moneyline price: Coco Gauff -1120 at DraftKings; Maria Camila Osorio Serrano +860 at FanDuel.

SideMarketBest LineWorst
Coco Gauff Moneyline DraftKings: -1120 -1613
Maria Camila Osorio Serrano Moneyline FanDuel: +860 +650
Coco Gauff -6.5 Spread Pinnacle: +107 -111
Maria Camila Osorio Serrano +6.5 Spread BetRivers: -122 -145
Over 18.5 Total ReBet: -104 -120
Under 18.5 Total Pinnacle: -108 -132
Coco Gauff -5.5 Spread betPARX: -190 -190
Maria Camila Osorio Serrano +5.5 Spread betPARX: +140 +140

Lin Zhu @ Donna Vekic

Fri, Oct 2, 11:00 PM EDT

Best moneyline price: Donna Vekic -175 at Hard Rock Bet; Lin Zhu +165 at Pinnacle.

SideMarketBest LineWorst
Donna Vekic Moneyline Hard Rock Bet: -175 -204
Lin Zhu Moneyline Pinnacle: +165 +140
Donna Vekic -3.5 Spread BetOnline.ag: +110 -111
Lin Zhu +3.5 Spread ReBet: -125 -130
Over 21.5 Total Pinnacle: -104 -124
Under 21.5 Total BetRivers: -108 -122
Donna Vekic -2.5 Spread BetRivers: -125 -130
Lin Zhu +2.5 Spread BetRivers: -106 -110
Donna Vekic -1.5 Spread betPARX: -152 -152
Lin Zhu +1.5 Spread betPARX: +112 +112
Donna Vekic -3 Spread Pinnacle: -110 -120
Lin Zhu +3 Spread Pinnacle: -104 -110

Elise Mertens @ Katie Volynets

Fri, Oct 2, 11:00 PM EDT

Best moneyline price: Katie Volynets +107 at Pinnacle; Elise Mertens -120 at Hard Rock Bet.

SideMarketBest LineWorst
Katie Volynets Moneyline Pinnacle: +107 -105
Elise Mertens Moneyline Hard Rock Bet: -120 -130
Katie Volynets +0.5 Spread LowVig.ag: +100 -113
Elise Mertens -0.5 Spread Bally Bet: -118 -125
Over 21.5 Total Pinnacle: -111 -125
Under 21.5 Total Pinnacle: -103 -117
Katie Volynets +1 Spread Pinnacle: -107 -115
Elise Mertens -1 Spread Pinnacle: -107 -115

Elina Svitolina @ Katerina Siniakova

Sat, Oct 3, 12:30 AM EDT

Best moneyline price: Katerina Siniakova +320 at FanDuel; Elina Svitolina -350 at 888sport.

SideMarketBest LineWorst
Katerina Siniakova Moneyline FanDuel: +320 +260
Elina Svitolina Moneyline 888sport: -350 -429
Katerina Siniakova +4.5 Spread LowVig.ag: +110 -110
Elina Svitolina -4.5 Spread Caesars: -130 -134
Over 20.5 Total LowVig.ag: +105 -115
Under 20.5 Total BetRivers: -121 -125
Katerina Siniakova +3.5 Spread Bally Bet: +145 +145
Elina Svitolina -3.5 Spread Bally Bet: -200 -200
Katerina Siniakova +5 Spread Pinnacle: -117 -125
Elina Svitolina -5 Spread Pinnacle: +102 -105
Over 20 Total Pinnacle: -111 -120
Under 20 Total Pinnacle: -103 -110

Paula Badosa @ Jelena Ostapenko

Sat, Oct 3, 12:30 AM EDT

Best moneyline price: Jelena Ostapenko +162 at FanDuel; Paula Badosa -168 at Pinnacle.

SideMarketBest LineWorst
Jelena Ostapenko Moneyline FanDuel: +162 +135
Paula Badosa Moneyline Pinnacle: -168 -196
Jelena Ostapenko +2.5 Spread LowVig.ag: +100 -110
Paula Badosa -2.5 Spread LowVig.ag: -120 -143
Over 21.5 Total Pinnacle: -113 -125
Under 21.5 Total Pinnacle: -102 -119
Jelena Ostapenko +1.5 Spread Bally Bet: +123 +123
Paula Badosa -1.5 Spread Bally Bet: -167 -167
Jelena Ostapenko +3 Spread Pinnacle: -113 -120
Paula Badosa -3 Spread Pinnacle: -101 -110

Storm Hunter @ Maria Sakkari

Sat, Oct 3, 12:30 AM EDT

Best moneyline price: Maria Sakkari -240 at Hard Rock Bet; Storm Hunter +221 at Pinnacle.

SideMarketBest LineWorst
Maria Sakkari Moneyline Hard Rock Bet: -240 -290
Storm Hunter Moneyline Pinnacle: +221 +175
Over 21.5 Total LowVig.ag: +100 -117
Under 21.5 Total Bally Bet: -114 -131
Maria Sakkari -2.5 Spread Bally Bet: -180 -180
Storm Hunter +2.5 Spread Bally Bet: +130 +130
Maria Sakkari -3.5 Spread BetRivers: -129 -137
Storm Hunter +3.5 Spread LowVig.ag: +117 -106
Maria Sakkari -4 Spread Pinnacle: -109 -115
Storm Hunter +4 Spread Pinnacle: -105 -115
Over 21 Total Pinnacle: -108 -115
Under 21 Total Pinnacle: -106 -115

Iga Swiatek @ Xinyu Gao

Sat, Oct 3, 1:00 AM EDT

Best moneyline price: Xinyu Gao +2890 at Pinnacle; Iga Swiatek -4500 at FanDuel.

SideMarketBest LineWorst
Xinyu Gao Moneyline Pinnacle: +2890 +1050
Iga Swiatek Moneyline FanDuel: -4500 -20000
Xinyu Gao +7.5 Spread LowVig.ag: +125 +108
Iga Swiatek -7.5 Spread LowVig.ag: -145 -167
Over 16.5 Total LowVig.ag: +116 +100
Under 16.5 Total betPARX: -134 -145
Xinyu Gao +8 Spread Pinnacle: -109 -115
Iga Swiatek -8 Spread Pinnacle: -107 -115
Over 16 Total Pinnacle: -115 -120
Under 16 Total Pinnacle: -102 -110

Harriet Dart @ Iva Jović

Sat, Oct 3, 2:00 AM EDT

Best moneyline price: Iva Jović -1100 at Hard Rock Bet; Harriet Dart +810 at FanDuel.

SideMarketBest LineWorst
Iva Jović Moneyline Hard Rock Bet: -1100 -1450
Harriet Dart Moneyline FanDuel: +810 +580
Iva Jović -6.5 Spread ReBet: -105 -115
Harriet Dart +6.5 Spread Pinnacle: -107 -143
Over 18.5 Total BetOnline.ag: +100 -115
Under 18.5 Total Pinnacle: -114 -129
Iva Jović -5.5 Spread betPARX: -190 -190
Harriet Dart +5.5 Spread betPARX: +140 +140

Leylah Fernandez @ Kamilla Rakhimova

Sat, Oct 3, 2:00 AM EDT

Best moneyline price: Kamilla Rakhimova +283 at LowVig.ag; Leylah Fernandez -324 at Pinnacle.

SideMarketBest LineWorst
Kamilla Rakhimova Moneyline LowVig.ag: +283 +240
Leylah Fernandez Moneyline Pinnacle: -324 -380
Kamilla Rakhimova +4.5 Spread Pinnacle: -110 -120
Leylah Fernandez -4.5 Spread LowVig.ag: -103 -125
Over 20.5 Total Pinnacle: -108 -120
Under 20.5 Total LowVig.ag: +100 -125
Kamilla Rakhimova +3.5 Spread Bally Bet: +133 +133
Leylah Fernandez -3.5 Spread Bally Bet: -180 -180

Frequently Asked Questions

What are the best WTA China Open lines today?

The table below shows which sportsbook has the best available price on each side of every upcoming WTA China Open event. Line shopping across multiple books can save you 1–3% per bet compared to sticking with a single sportsbook.

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.