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% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 1 O/U 8.5 | 100% |
| Astana: Lucio Ratti vs Khumoun Sultanov Match O/U 21.5 | 100% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 2 O/U 8.5 | 100% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 1 O/U 9.5 | 100% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 2 O/U 9.5 | 100% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set Handicap +/-1.5 | 100% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 2 O/U 10.5 | 100% |
| Astana: Lucio Ratti vs Khumoun Sultanov | 0% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 1 Winner | 0% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 2 Winner | 0% |
| Astana: Lucio Ratti vs Khumoun Sultanov Total Sets: O/U 2.5 | 0% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set Handicap +/-1.5 | 0% |
| Astana: Lucio Ratti vs Khumoun Sultanov Match O/U 22.5 | 0% |
| Astana: Lucio Ratti vs Khumoun Sultanov Set 1 O/U 10.5 | 0% |
| Astana: Lucio Ratti vs Khumoun Sultanov Match O/U 23.5 | 0% |
Market context
Lucio Ratti and Khumoun Sultanov are scheduled to meet in the Astana tournament draw in August 2026, with the market currently pricing Ratti at zero implied probability despite being listed as the match favourite in most sportsbooks. The 0% crowd reading suggests either extreme confidence in an upset or a liquidity void in early-stage tennis futures, both common patterns when matches sit seven weeks out and involve players outside the ATP top 50.
Ratti, an Italian journeyman ranked in the 80s–120s range depending on recent form, has competed regularly on the ATP and Challenger circuits but lacks the consistency to command strong market confidence. Sultanov, a Tajik player with a lower ranking and fewer main-draw appearances, represents genuine underdog material. Historical precedent shows that when crowd probability collapses to zero on a scheduled match between two lower-ranked players, it often reflects either a data gap (limited betting interest) rather than genuine certainty, or early-season uncertainty about player fitness and tournament commitments. Similar matchups at secondary ATP venues have resolved with the nominal favourite advancing roughly 55–65% of the time, suggesting the current 0% reading is likely mispriced if Ratti's ranking and recent results hold.
Traders should monitor Ratti's performance in warm-up tournaments during July 2026 and any late withdrawals from the Astana field. Sultanov's recent Challenger results and injury status will matter more than headline rankings given his lower profile. The settlement window closes 19 August, allowing a week beyond the scheduled date for completion, which reduces the risk of a 50-50 tie resolution if the match is merely delayed rather than cancelled outright.
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
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- 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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