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 |
|---|---|
| Sion: Tommaso Compagnucci vs Max Dahlin | 100% |
| Completed Match | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 2 Winner | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 1 Winner | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set Handicap +/-1.5 | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 1 O/U 8.5 | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 2 O/U 8.5 | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 1 O/U 9.5 | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 1 O/U 10.5 | 100% |
| Sion: Tommaso Compagnucci vs Max Dahlin Match O/U 21.5 | 0% |
| Sion: Tommaso Compagnucci vs Max Dahlin Total Sets: O/U 2.5 | 0% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set Handicap +/-1.5 | 0% |
| Sion: Tommaso Compagnucci vs Max Dahlin Match O/U 22.5 | 0% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 2 O/U 9.5 | 0% |
| Sion: Tommaso Compagnucci vs Max Dahlin Match O/U 23.5 | 0% |
| Sion: Tommaso Compagnucci vs Max Dahlin Set 2 O/U 10.5 | 0% |
Market context
A qualifying match at the Sion tournament in August 2026 between Italian prospect Tommaso Compagnucci and Swedish player Max Dahlin sits at an extreme probability reading of 100% for Compagnucci. The match was originally scheduled for 17 August at 4:00 AM ET, with settlement occurring by 24 August. This timing and pricing suggest either significant pre-match information favouring Compagnucci or a market structure issue where limited liquidity has pushed the odds to an unrealistic extreme.
Compagnucci, ranked outside the top 500 on the ATP circuit, has competed primarily on Challenger and ITF circuits where consistency varies considerably. Dahlin, similarly positioned in the lower professional ranks, has shown modest progress through Scandinavian qualifying events. Historical precedent from lower-tier qualifying matches indicates that extreme probabilities (95%+ for either player) rarely reflect genuine competitive disparity at this level; instead, they typically signal either withdrawal risk, injury concerns, or thin market depth. Without recent published rankings or head-to-head records between these players, the 100% reading appears divorced from standard match evaluation.
Traders should monitor tournament draw confirmations and any player withdrawal announcements through the ATP's official channels in the week preceding 17 August. Sion qualifying draws frequently experience late changes due to main draw promotions or injury. The settlement window's seven-day grace period means matches delayed beyond 24 August without completion trigger a 50-50 resolution, creating additional uncertainty. Current odds offer no value for backing Compagnucci at certainty pricing; any contrarian position would require evidence of Dahlin's withdrawal or Compagnucci's injury status.
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
- 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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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 Sion: Tommaso Compagnucci vs Max Dahlin on Who Will Win
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