Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves | 100% |
| Completed Match | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 1 O/U 8.5 | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 2 O/U 8.5 | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 1 Winner | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 2 Winner | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 2 O/U 9.5 | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set Handicap +/-1.5 | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Game Spread +/-3.5 | 100% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Total Sets: O/U 2.5 | 0% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Match O/U 21.5 | 0% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 1 O/U 9.5 | 0% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Match O/U 22.5 | 0% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 2 O/U 10.5 | 0% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Set 1 O/U 10.5 | 0% |
| US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves Match O/U 23.5 | 0% |
Market context
Dalibor Svrcina beat Felipe Meligeni Alves 2-0 in the US Open qualifying first round, so the market should already be resolved unless the exchange is still waiting on official confirmation. The match was listed for 24 August at the USTA Billie Jean King National Tennis Centre, with Svrcina seeded and ranked materially higher than Meligeni Alves in the qualifying field, which fits the pre-match pricing that had Svrcina favoured.
For a market opened on a tennis qualifier, a 100% crowd-implied YES typically reflects either a completed result or near-certain expectation of one, and here the live scoresheets show the contest finished in straight sets. The key comparable case is not a close win but a completed first-round qualifying match on hard courts: once the scoreboard and draw both show progression, the only real settlement risk is an administrative delay or correction.
For traders watching the on-chain side, the relevant catalyst is no longer the sporting schedule but the exchange’s settlement workflow in USDC and any delay between official tennis confirmation and market closure. If the contract remains open, the main dependency is whether the operator has ingested the result from the US Open draw; if not, resolution should still track the match outcome unless the event was abandoned entirely, which the reported completed score makes unlikely.
Methodology
This page reads US Open, Qualification ATP: Dalibor Svrcina vs Felipe Meligeni Alves on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
UK Frequently Asked Questions
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- Why USDC and not ETH or USDT?
- USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
Trade US Open, Qualification ATP: Dalibor Svrcina vs Felip… on BTC Prediction
Live order book, 0% fees, USDC settlement in seconds.
Open live market →