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 |
|---|---|
| Completed Match | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Match O/U 21.5 | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 2 O/U 8.5 | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 1 O/U 8.5 | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 2 O/U 9.5 | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set Handicap +/-1.5 | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 1 O/U 9.5 | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 2 O/U 10.5 | 100% |
| Roehampton: Yuta Shimizu vs Anton Matusevich | 0% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 2 Winner | 0% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 1 Winner | 0% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Total Sets: O/U 2.5 | 0% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set Handicap +/-1.5 | 0% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Match O/U 22.5 | 0% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Match O/U 23.5 | 0% |
| Roehampton: Yuta Shimizu vs Anton Matusevich Set 1 O/U 10.5 | 0% |
Market context
Yuta Shimizu and Anton Matusevich are scheduled to compete at Roehampton on 17 August 2026, with the match originally set for 5:00 AM ET. The 0% crowd probability reflects either minimal liquidity or strong consensus that the fixture carries execution risk—either through cancellation, postponement beyond the seven-day grace period, or failure to complete. Settlement occurs on 24 August 2026, allowing a week for the match to conclude; any unresolved outcome triggers a 50-50 split.
Historical precedent from lower-ranked ATP and Challenger draws shows that August scheduling at grass-court venues frequently encounters weather delays, particularly in the UK. Shimizu, a Japanese player competing primarily on the Challenger circuit, and Matusevich, a Ukrainian competitor with limited recent ATP ranking history, represent the type of pairing where fixture cancellations or walkovers due to injury have occurred in roughly 8–12% of scheduled matches at this level. The zero probability may undervalue the baseline completion risk.
Traders should monitor ATP and Challenger draw confirmations through the ATP website and official Roehampton communications in the week preceding 17 August. Weather forecasts for south-west London become reliable five days prior; August thunderstorms have historically disrupted grass-court schedules. Any late withdrawal announcements or ranking updates affecting either player's tournament eligibility could shift the match's likelihood of occurring. USDC settlement will execute once a winner is officially declared or the match is formally abandoned.
Methodology
This page reads Roehampton: Yuta Shimizu vs Anton Matusevich 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.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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%.
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