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 |
|---|---|
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 1 O/U 8.5 | 100% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 1 O/U 9.5 | 100% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 1 O/U 10.5 | 100% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Match O/U 23.5 | 54% |
| Completed Match | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 2 Winner | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 2 O/U 8.5 | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Total Sets: O/U 2.5 | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Match O/U 21.5 | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 2 O/U 9.5 | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set Handicap +/-1.5 | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Match O/U 22.5 | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 2 O/U 10.5 | 50% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka | 22% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set Handicap +/-1.5 | 1% |
| Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka Set 1 Winner | 0% |
Market context
Alexander Donski and Daniil Glinka are due to meet in Grodzisk Mazowiecki on outdoor hard, with live listings placing Glinka well ahead in the rankings and bookmakers making him the shorter-priced runner before play. SofaScore lists Glinka at ATP 169 against Donski at ATP 538, while betting screens have shown Glinka around 1.50–1.44 and Donski around 2.50–2.59, which sits broadly in line with a market that has the favourite near two-thirds to win.[1][6][10][17]
That makes the current 67% implied probability a clean read on ranking gap rather than a near coin flip. Comparable tennis pricing in this event has also leaned to Glinka, with TennisTemple and TennisTonic both framing him as the stronger side, and TennisExplorer showing average odds around 3.80 for Donski in the quarter-final draw; with no prior head-to-head recorded in several databases, traders are mostly relying on form, level, and surface rather than matchup history.[6][7][9][18]
For settlement, the main catalysts are straightforward: the match starts on time, is completed, and produces a winner before the 7-day delay threshold, otherwise the contract can revert to 50-50 under the market rules. The practical watchlist is the official order of play, any late court reassignment or weather interruption, and whether the ATP Challenger schedule keeps this quarter-final on the same day; live scoreboards currently still list the fixture as pending at 10:00 UTC, which matters because a scrape showing “upcoming” can shift quickly once first serve is called.[1][8][15]
Methodology
This page reads Grodzisk Mazowiecki: Alexander Donski vs Daniil Glinka 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 are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- 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.
- 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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