Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
23% | 77% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
23% | 77% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Aryna Sabalenka | 23% |
| Coco Gauff | 18% |
| Iga Swiatek | 14% |
| Jessica Pegula | 8% |
| Elena Rybakina | 6% |
| Mirra Andreeva | 5% |
| Naomi Osaka | 5% |
| Karolina Muchova | 5% |
| Alexandra Eala | 4% |
| Amanda Anisimova | 3% |
| Marta Kostyuk | 3% |
| Linda Noskova | 2% |
| Elina Svitolina | 2% |
| Qinwen Zheng | 1% |
| Madison Keys | 1% |
| Diana Shnaider | 1% |
| Iva Jovic | 1% |
| Maria Sakkari | 1% |
| Barbora Krejcikova | 0% |
| Marketa Vondrousova | 0% |
| Victoria Mboko | 0% |
| Emma Navarro | 0% |
| Clara Tauson | 0% |
| Belinda Bencic | 0% |
| Emma Raducanu | 0% |
| Jasmine Paolini | 0% |
| Paula Badosa | 0% |
| Maya Joint | 0% |
| Ekaterina Alexandrova | 0% |
| Jelena Ostapenko | 0% |
| Daria Kasatkina | 0% |
| Tereza Valentova | 0% |
| Anastasia Potapova | 0% |
| Donna Vekic | 0% |
| Dayana Yastremska | 0% |
| Liudmila Samsonova | 0% |
| Xiyu Wang | 0% |
| Ashlyn Krueger | 0% |
| Marie Bouzkova | 0% |
| Beatriz Haddad Maia | 0% |
| Elise Mertens | 0% |
| Sofia Kenin | 0% |
| Katie Boulter | 0% |
| Other | 0% |
| Sorana Cirstea | 0% |
| Maja Chwalinska | 0% |
| Anna Kalinskaya | 0% |
| Sara Bejlek | 0% |
| Ann Li | 0% |
| Leylah Fernandez | 0% |
| Diane Parry | 0% |
| Nadia Podoroska | 0% |
| Janice Tjen | 0% |
| Cristina Bucsa | 0% |
| Magdalena Frech | 0% |
| Katerina Siniakova | 0% |
| Daria Snigur | 0% |
| Lilli Tagger | 0% |
| Zeynep Sonmez | 0% |
| Peyton Stearns | 0% |
| Viktorija Golubic | 0% |
| Camila Osorio | 0% |
| Caty McNally | 0% |
| Elisabetta Cocciaretto | 0% |
| Magda Linette | 0% |
| Sloane Stephens | 0% |
| Taylor Townsend | 0% |
Market context
2026 Women’s US Open Winner (Tennis). The market is currently pricing the outcome at 23% YES, meaning crowd-implied probability sits at that level. Settlement is scheduled for 2026-09-13T00:00:00Z. Unlike a sportsbook, the price you see is set by buyers and sellers competing in a live order book — there is no house edge or bookmaker margin to fade.
Sports outcome markets resolve from official league data once the contest finishes. Pricing typically tightens through the warm-up window as line-ups, weather, and starting-pitcher data become public, then moves on goals or runs in real time.
Watch for the underlying catalysts that move this category: each official announcement, dataset release, or scheduled milestone generally produces a step change in the implied probability. Trades execute instantly on Polygon, and shares pay $1 each at resolution if your side wins.
Methodology
Sports-specific comparison page for 2026 Women’s US Open Winner (Tennis). Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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