Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| Completed Match | 100% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 2 O/U 8.5 | 100% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set Handicap +/-1.5 | 100% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 2 O/U 9.5 | 100% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 2 O/U 10.5 | 100% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 1 Winner | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 2 Winner | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 1 O/U 8.5 | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Match O/U 21.5 | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set Handicap +/-1.5 | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Total Sets: O/U 2.5 | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Match O/U 22.5 | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 1 O/U 9.5 | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Set 1 O/U 10.5 | 0% |
| Kingston: Joel Schwaerzler vs Kenta Miyoshi Match O/U 23.5 | 0% |
Market context
A professional tennis match between Austrian qualifier Joel Schwaerzler and Japanese competitor Kenta Miyoshi is scheduled for the Kingston tournament on 18 August 2026. The 0% implied probability suggests either significant uncertainty about match completion or a strong consensus favouring one player that hasn't yet crystallised in the market. Settlement occurs on 25 August, allowing a one-week window for the match to conclude.
Schwaerzler, ranked outside the top 200 for most of 2025–26, has competed primarily on the Challenger circuit where he's shown modest results. Miyoshi similarly operates at lower ATP rankings, with limited Grand Slam or Masters 1000 exposure. When two players of comparable ranking meet at a secondary ATP 250 event, historical precedent suggests the match typically goes to the higher-ranked player or the one with recent tournament momentum. The 0% probability may reflect incomplete market data rather than genuine uncertainty—Kingston draws modest trading volume compared to major events, and early-stage odds often show extreme values before liquidity arrives.
Traders should monitor official ATP confirmation of the draw and any late withdrawals, particularly given the August timing when players rotate between summer hard-court events. Injury announcements or schedule conflicts affecting either player could trigger a shift toward the 50-50 tie resolution. Recent tournament results for both players in July–August 2026 will provide the most reliable indicator of form heading into the match. The settlement window's seven-day grace period means delays beyond 25 August would resolve the market at even odds rather than favouring either competitor.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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.
- 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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