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 |
|---|---|
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco | 100% |
| Completed Match | 100% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 2 Winner | 100% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Match O/U 21.5 | 100% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 2 O/U 8.5 | 100% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Total Sets: O/U 2.5 | 100% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Match O/U 22.5 | 100% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Match O/U 23.5 | 100% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set Handicap +/-1.5 | 0% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 1 O/U 8.5 | 0% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 1 Winner | 0% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set Handicap +/-1.5 | 0% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 2 O/U 9.5 | 0% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 1 O/U 9.5 | 0% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 1 O/U 10.5 | 0% |
| ITF W35 Bistrita Women: Jessica Pieri vs Federica Sacco Set 2 O/U 10.5 | 0% |
Market context
Jessica Pieri and Federica Sacco are scheduled to meet in the ITF Women's 35 category tournament in Bistrita on 18 August 2026. The market currently reflects 100% implied probability for Pieri, suggesting the crowd views her as a near-certain winner. This extreme skew warrants scrutiny, particularly given that ITF W35 events typically feature competitive matchups between players of similar ranking bands and experience levels.
Historical context for ITF W35 tournaments shows that consensus probabilities above 95% are rare and often reflect either significant ranking disparities or recent form divergences. Pieri's career trajectory and recent results would need to demonstrate clear superiority—such as a substantially higher ranking, recent tournament wins, or head-to-head advantage—to justify such certainty. Sacco's record in comparable events and her performance trajectory matter considerably; if she has shown competitive results against similarly ranked opponents, the 100% reading becomes questionable. The settlement window extends to 25 August, allowing seven days beyond the scheduled date for completion, which reduces cancellation risk but leaves room for delays or incomplete matches.
Traders should monitor official ITF announcements regarding player withdrawals or scheduling changes in the week preceding the match. Court conditions, weather forecasts for Bistrita, and any late injury reports could shift the competitive balance. Recent form data—tournament results from July and early August 2026—will be critical for reassessing whether the consensus probability reflects genuine dominance or overconfidence. The extreme probability leaves minimal room for value on either side unless new information emerges about player fitness or availability.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
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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