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 |
|---|---|
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez | 100% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Total Sets: O/U 2.5 | 100% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 2 Winner | 100% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 1 O/U 8.5 | 100% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 1 O/U 9.5 | 100% |
| Completed Match | 50% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 1 Winner | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 2 O/U 8.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set Handicap +/-1.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Match O/U 21.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 2 O/U 9.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set Handicap +/-1.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Match O/U 22.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 1 O/U 10.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Set 2 O/U 10.5 | 0% |
| Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez Match O/U 23.5 | 0% |
Market context
The Prague 2 doubles draw pits Recek and Siniakov against Kielan and Hernandez in what was originally scheduled as an early-morning match on 18 August 2026. The 100% crowd-implied probability reflects either exceptionally high confidence in one pairing's superiority or sparse liquidity in the order book; such extreme readings often signal thin participation rather than certainty. Settlement occurs via USDC on 25 August, allowing a week's buffer for match completion, rescheduling, or administrative resolution.
Historical precedent from lower-tier ATP doubles events shows that pairings assembled for secondary tournaments frequently feature asymmetric player rankings and inconsistent form. Recek and Siniakov's partnership record against comparable opponents, alongside Kielan and Hernandez's recent doubles activity, should anchor any reassessment of the current odds. Matches at Prague 2 have occasionally faced weather delays or scheduling conflicts that push resolution beyond the original date; the market's 50-50 fallback clause accounts for such friction, though it rarely triggers unless external disruption occurs.
Traders monitoring this contract should track official ATP communications regarding the Prague 2 draw confirmation and any weather alerts for mid-August Central Europe conditions. Recent funding rate data from major spot exchanges shows modest volatility in BTC/ETH pairs, suggesting macro sentiment remains relatively stable and unlikely to trigger mass liquidations that might distort prediction market participation. Court availability and player injury announcements in the fortnight before the match represent the primary catalysts that could shift the current extreme probability reading.
Methodology
This page reads Prague 2 (Doubles): Recek/Siniakov vs Kielan/Hernandez on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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%.
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