Tennis
Where WTA prices disagree.
WTA is priced two different ways at the same time: traders set it on Kalshi and Polymarket, and the sportsbooks set it themselves. When the two disagree far enough to survive the fees, it lands here.
Where WTA gets priced
- Prediction markets
- Kalshi and Polymarket
- Sportsbooks
- DraftKings, FanDuel, BetMGM, BetRivers, Fanatics, Caesars
What we have recorded
83
Gaps found
0.9%
Median gap
37.4%
Biggest gap
- Oct 19Katarzyna Kawa vs Maja ChwalinskaPolymarket + BetRivers28.0%
- Oct 18Katarzyna Kawa vs Maja ChwalinskaPolymarket + DraftKings3.6%
- Oct 18Katarzyna Kawa vs Maja ChwalinskaPolymarket + FanDuel1.2%
- Oct 18Katarzyna Kawa vs Maja ChwalinskaPolymarket + DraftKings0.4%
- Oct 18Alexandra Eala vs Diane ParryKalshi + Polymarket0.5%
- Oct 17Maja Chwalinska vs Sonay KartalPolymarket + DraftKings0.3%
- Oct 14Ashlyn Krueger vs Iga SwiatekKalshi + FanDuel1.1%
- Oct 14Jelena Ostapenko vs Jessica PegulaPolymarket + BetRivers0.4%
- Oct 13Aryna Sabalenka vs Ann LiFanDuel + DraftKings1.6%
- Oct 13Yulia Putintseva vs Diana ShnaiderKalshi + DraftKings0.7%
- Oct 13Ashlyn Krueger vs Shuai ZhangPolymarket + BetRivers0.9%
- Oct 12Ann Li vs Qinwen ZhengPolymarket + Fanatics18.1%
- Oct 11Ann Li vs Qinwen ZhengPolymarket + FanDuel21.7%
- Oct 11Mananchaya Sawangkaew vs Magdalena FrechPolymarket + DraftKings0.4%
- Oct 11Mayar Sherif vs Maja ChwalinskaPolymarket + FanDuel0.8%
- Oct 11Alexandra Eala vs Han ShiPolymarket + DraftKings0.9%
- Oct 11Belinda Bencic vs Shuai ZhangPolymarket + BetMGM37.4%
- Oct 11Diane Parry vs Anna KalinskayaPolymarket + Fanatics13.3%
- Oct 11Belinda Bencic vs Shuai ZhangPolymarket + BetMGM37.4%
- Oct 11Diane Parry vs Anna KalinskayaPolymarket + BetRivers14.1%
- Oct 11Janice Tjen vs Oleksandra OliynykovaPolymarket + BetRivers23.1%
- Oct 11Janice Tjen vs Oleksandra OliynykovaPolymarket + BetMGM25.6%
- Oct 10Clara Tauson vs Marie BouzkovaPolymarket + BetRivers0.2%
- Oct 10Xiyu Wang vs Xinyu WangPolymarket + DraftKings0.9%
- Oct 10Maria Sakkari vs Donna VekicPolymarket + BetRivers0.4%
- Oct 10Clara Tauson vs Marie BouzkovaPolymarket + BetRivers0.2%
- Oct 5Linda Noskova vs Ekaterina AlexandrovaPolymarket + DraftKings0.7%
- Oct 2Xinran Sun vs Cristina BucsaPolymarket + FanDuel0.6%
- Oct 2Maria Timofeeva vs Naomi OsakaPolymarket + BetRivers0.7%
- Oct 1Katerina Siniakova vs Elina SvitolinaPolymarket + BetRivers0.7%
The 30 most recent of 83. Every percentage is what the quoted prices implied at the moment we saw them, after fees and after the cost of your own order moving the book. Nobody placed these, and nothing already written is ever recalculated. The whole record across every sport is on the log.
Reading a WTA gap
A gap means backing one side on a prediction market and the other side at a sportsbook, splitting a stake between them so both outcomes pay back more than you put in. The percentage is what is left after Kalshi’s per-contract fee, Polymarket's 2%, and the price movement your own order causes, with the rounding running against the estimate.
It is an estimate from public prices at a moment in time, not a guarantee. A gap can close while you are placing the second order, and a half-filled pair is a one-sided bet rather than a hedge. The walkthrough runs the arithmetic end to end, and today’s live WTA board is on the front page.
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