Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Hagen: Jerome Kym vs Max Houkes | 100% |
| Completed Match | 100% |
| Hagen: Jerome Kym vs Max Houkes Set 1 Winner | 100% |
| Hagen: Jerome Kym vs Max Houkes Set 2 Winner | 100% |
| Hagen: Jerome Kym vs Max Houkes Set 1 O/U 8.5 | 100% |
| Hagen: Jerome Kym vs Max Houkes Set Handicap +/-1.5 | 100% |
| Hagen: Jerome Kym vs Max Houkes Match O/U 21.5 | 100% |
| Hagen: Jerome Kym vs Max Houkes Set 2 O/U 8.5 | 100% |
| Hagen: Jerome Kym vs Max Houkes Set 2 O/U 9.5 | 100% |
| Hagen: Jerome Kym vs Max Houkes Set 2 O/U 10.5 | 100% |
| Hagen: Jerome Kym vs Max Houkes Total Sets: O/U 2.5 | 0% |
| Hagen: Jerome Kym vs Max Houkes Set 1 O/U 9.5 | 0% |
| Hagen: Jerome Kym vs Max Houkes Set Handicap +/-1.5 | 0% |
| Hagen: Jerome Kym vs Max Houkes Match O/U 22.5 | 0% |
| Hagen: Jerome Kym vs Max Houkes Set 1 O/U 10.5 | 0% |
| Hagen: Jerome Kym vs Max Houkes Match O/U 23.5 | 0% |
Market context
Polymarket is pricing Jerome Kym at **100%** on the YES side for this Hagen Challenger match, so the contract is effectively trading as a full certainty that Kym advances against Max Houkes. Because the market settles through Polymarket’s **USDC**-based, **Polygon**-settled conditional tokens, the practical question for holders is not who is favoured in the abstract, but whether the official result produces a clean Kym advancement before the settlement window closes.
That pricing is far above the wider tennis market read. Tennis.com’s event listing showed Kym as the projected winner at **59%**, while sportsbook and prediction sites generally placed him in the low-to-mid 60s or shorter in moneyline terms, with Sportsbet listing Kym at **1.40** and Houkes at **2.60**. The head-to-head record is thin, but published previews point to Kym leading the matchup and several operators and model-based sites leaning his way, which makes the on-chain price look like it already reflects an assumption that the match resolves normally rather than drifts into a settlement edge case.
The main catalysts are straightforward: official ATP Challenger scheduling updates, any late draw corrections, and whether the match is started, completed, or abandoned. Polymarket’s rules matter here, because if the contest is cancelled, ends tied, or is delayed beyond seven days without a winner, the market resolves **50-50**, while a retirement or default after the match begins still counts for the player who advances. Traders should watch the tournament feed and live scoring closely, since several tennis listings placed the fixture on 5–6 August and some sources differed on timing and surface, which is exactly the kind of ambiguity that can matter when a contract is pinned near a binary outcome.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.
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
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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%.
Trade Hagen: Jerome Kym vs Max Houkes on PolyGram
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