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% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Total Sets: O/U 2.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Match O/U 21.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 2 Winner | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 1 O/U 8.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 2 O/U 8.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Match O/U 22.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 2 O/U 9.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 1 O/U 9.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Match O/U 23.5 | 100% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda | 0% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 1 Winner | 0% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set Handicap +/-1.5 | 0% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 1 O/U 10.5 | 0% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set 2 O/U 10.5 | 0% |
| Istanbul 2: Paul Inchauspe vs Koki Matsuda Set Handicap +/-1.5 | 0% |
Market context
Paul Inchauspe vs Koki Matsuda is a scheduled ITF-level tennis match, and the market currently pricing **0% YES** implies the crowd sees no realistic path for Inchauspe to advance under the contract’s settlement rules. Inchauspe is a French player born in 2004 with a modest pro record and ATP ranking around the high 800s to low 900s in recent player databases, which is consistent with the sort of low-liquidity, early-round match where market pricing can stay pinned until line-ups are confirmed[1][2][5][9]. Comparable cases on this kind of market often settle only when the match is actually played, because a cancellation, walkover, or delay beyond seven days triggers the 50-50 fallback rather than a player-specific outcome.
The key catalysts are the official order of play, any late withdrawal, and whether the event can stage the match on the scheduled day or within the seven-day settlement window. For traders watching the on-chain side, the contract will ultimately resolve in USDC on the market venue, so the practical risk is not just the tennis result but whether the fixture is completed cleanly enough to avoid the fallback path; in thin markets, that often matters more than pre-match form. If broader crypto conditions are relevant, BTC and ETH spot weakness or strong leverage flushes can affect risk appetite across prediction markets, but they do not change the contract logic itself. The nearest live signal is the tournament’s published schedule and any official scratch or withdrawal notice, with player availability likely more important than pre-match ranking gaps in deciding whether this stays at 0% or snaps towards a binary outcome.
Methodology
This page reads Istanbul 2: Paul Inchauspe vs Koki Matsuda 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%.
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