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 |
|---|---|
| Roehampton: Radu Albot vs Leonardo Rossi | 100% |
| Completed Match | 100% |
Market context
Radu Albot, the Moldovan veteran ranked outside the top 200, faces Leonardo Rossi in qualifying at Roehampton in August 2026. The match is scheduled for 7:10 AM ET on 17 August, with settlement contingent on a decisive result within seven days. The 100% implied probability reflects either strong conviction in Albot's superiority or minimal liquidity depth; such extreme crowding often signals thin order books rather than certainty, particularly in lower-tier qualifying matches where participant data is sparse.
Albot's career record against lower-ranked opponents and his recent ATP Challenger performances provide the primary baseline for comparison. Players of Albot's ranking typically advance through qualifying rounds at grass-court events at rates between 55–70%, depending on draw strength and surface adaptation. Rossi's recent ITF and Challenger results—if available through ATP or Challenger databases—would clarify whether this is a mismatch or a closer contest. The 100% reading suggests traders may be anchoring to seeding or ranking alone without accounting for recent form volatility or grass-court-specific preparation.
Key catalysts include official draw confirmation and any late withdrawals or injuries in the fortnight before the event. Grass-court qualifying draws often see last-minute changes due to main-draw promotions or player illness. Weather delays at Roehampton could trigger the seven-day tie-break clause, forcing 50-50 settlement if play extends beyond 24 August. Traders should monitor ATP and LTA announcements for draw updates and any fitness concerns affecting either player in the weeks preceding the match.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
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
- 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.
- Can I use Bitcoin directly?
- No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.
- 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 Roehampton: Radu Albot vs Leonardo Rossi on BTC Prediction
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