Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets) Pick polygram.ink (preferred broker) |
67% | 33% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
67% | 33% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| US Open WTA: Venus Williams vs Sofia Kenin Set Handicap +/-1.5 | 67% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 1 O/U 8.5 | 61% |
| US Open WTA: Venus Williams vs Sofia Kenin Game Spread +/-5.5 | 55% |
| Completed Match | 50% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 2 O/U 8.5 | 50% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 1 O/U 9.5 | 50% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 2 O/U 9.5 | 50% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 2 O/U 10.5 | 50% |
| US Open WTA: Venus Williams vs Sofia Kenin Match O/U 21.5 | 41% |
| US Open WTA: Venus Williams vs Sofia Kenin Match O/U 22.5 | 38% |
| US Open WTA: Venus Williams vs Sofia Kenin Match O/U 23.5 | 30% |
| US Open WTA: Venus Williams vs Sofia Kenin Total Sets: O/U 2.5 | 27% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 2 Winner | 22% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 1 Winner | 21% |
| US Open WTA: Venus Williams vs Sofia Kenin Set 1 O/U 10.5 | 17% |
| US Open WTA: Venus Williams vs Sofia Kenin | 14% |
Market context
Traders on decentralised prediction markets give 67% probability to us open wta: venus williams vs sofia kenin. This market refers to the tennis match between Venus Williams and Sofia Kenin in the US Open WTA, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to 'Venus Williams' …
Methodology
We track US Open WTA: Venus Williams vs Sofia Kenin across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
FAQ
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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