Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) 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 |
|---|---|
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka | 100% |
| Completed Match | 100% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 2 Winner | 100% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 2 O/U 8.5 | 100% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Total Sets: O/U 2.5 | 100% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Match O/U 21.5 | 100% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Match O/U 22.5 | 100% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Match O/U 23.5 | 100% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 1 Winner | 0% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 1 O/U 8.5 | 0% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set Handicap +/-1.5 | 0% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 2 O/U 9.5 | 0% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set Handicap +/-1.5 | 0% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 1 O/U 9.5 | 0% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 2 O/U 10.5 | 0% |
| Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka Set 1 O/U 10.5 | 0% |
Market context
Andrea Guerrieri is facing Daniil Glinka in the Grodzisk Mazowiecki Challenger semi-finals on outdoor hard courts, with Glinka listed higher in the ATP rankings at around No. 169 and Guerrieri around No. 215. The crowd’s 100% YES price reflects the market already treating this as a one-way outcome, but the underlying tennis profile is closer to a competitive semi-final than a routine mismatch: there is no established head-to-head, so prior direct evidence is absent, and comparable previews have framed the contest as hinging on surface comfort, serving stability and return pressure rather than on any long rivalry pattern.[1][10][11][14][17]
Form in the week points to both men arriving with live momentum, which is the main reason to resist reading the price as a pure ranking bet. Guerrieri came through his quarter-final against Michele Ribecai in three sets, while Glinka advanced past Alexander Donski in straight sets, and both have already handled the Polish hard courts well this week.[12][14][17] The key catalysts to watch are official ATP draw updates, late schedule slippage and any fitness or retirement news from the tournament desk, because the market resolves to 50-50 if the match is not played or is delayed beyond seven days without a winner.[18]
Methodology
Sports-specific comparison page for Grodzisk Mazowiecki: Andrea Guerrieri vs Daniil Glinka. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- 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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