Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via March Madness Predictions) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| US Open WTA: Marta Kostyuk vs Storm Hunter | 100% |
| Completed Match | 100% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 1 Winner | 100% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 2 Winner | 100% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 1 O/U 8.5 | 100% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set Handicap +/-1.5 | 100% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 1 O/U 9.5 | 100% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Game Spread +/-5.5 | 100% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Total Sets: O/U 2.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Match O/U 21.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 2 O/U 8.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Match O/U 22.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 2 O/U 9.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set Handicap +/-1.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 1 O/U 10.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Match O/U 23.5 | 0% |
| US Open WTA: Marta Kostyuk vs Storm Hunter Set 2 O/U 10.5 | 0% |
Market context
Market consensus: 100% chance of us open wta: marta kostyuk vs storm hunter. Prediction markets aggregate real capital to produce this probability signal. This market refers to the tennis match between Marta Kostyuk and Storm Hunter in the US Open WTA, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve …
Methodology
Sports-specific comparison page for US Open WTA: Marta Kostyuk vs Storm Hunter. 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.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
- 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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