Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi vs Polymarket) Pick polygram.ink (preferred broker) |
75% | 25% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
75% | 25% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| US Open ATP: Alexander Zverev vs Ben Shelton Set 2 O/U 8.5 | 75% |
| US Open ATP: Alexander Zverev vs Ben Shelton Total Sets: O/U 3.5 | 71% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 1 O/U 8.5 | 71% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 1 O/U 9.5 | 65% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 2 O/U 9.5 | 65% |
| US Open ATP: Alexander Zverev vs Ben Shelton Match O/U 36.5 | 62% |
| US Open ATP: Alexander Zverev vs Ben Shelton Match O/U 38.5 | 60% |
| US Open ATP: Alexander Zverev vs Ben Shelton | 59% |
| US Open ATP: Alexander Zverev vs Ben Shelton Match O/U 40.5 | 56% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 4 Winner | 55% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 1 Winner | 54% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 2 Winner | 53% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 3 Winner | 51% |
| US Open ATP: Alexander Zverev vs Ben Shelton Game Spread +/-1.5 | 51% |
| Completed Match | 50% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 3 O/U 8.5 | 50% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 3 O/U 9.5 | 50% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 3 O/U 10.5 | 50% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 4 O/U 8.5 | 50% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 4 O/U 9.5 | 50% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 4 O/U 10.5 | 50% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 1 O/U 10.5 | 45% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set Handicap +/-1.5 | 40% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set 2 O/U 10.5 | 34% |
| US Open ATP: Alexander Zverev vs Ben Shelton Total Sets: O/U 4.5 | 33% |
| US Open ATP: Alexander Zverev vs Ben Shelton Set Handicap +/-2.5 | 20% |
Market context
Based on real-money crowd forecasting, us open atp: alexander zverev vs ben shelton stands at 75% likelihood according to current market consensus. This market refers to the tennis match between Alexander Zverev and Ben Shelton in the US Open ATP, originally scheduled for September 13, 2026 at 2:00PM ET. This market will reso…
Methodology
We track US Open ATP: Alexander Zverev vs Ben Shelton 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
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- 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.
- 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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