Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) 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 |
|---|---|
| ITF Roehampton: Charles Broom vs Oliver Tarvet | 100% |
| Completed Match | 100% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 1 Winner | 100% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 1 O/U 8.5 | 100% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 2 Winner | 100% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Total Sets: O/U 2.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 2 O/U 8.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Match O/U 21.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set Handicap +/-1.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 2 O/U 9.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 1 O/U 9.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Match O/U 22.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 2 O/U 10.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Set 1 O/U 10.5 | 0% |
| ITF Roehampton: Charles Broom vs Oliver Tarvet Match O/U 23.5 | 0% |
Market context
The key change in the last day is that the Roehampton final has moved from pre-match pricing into live play, with Charles Broom and Oliver Tarvet listed for an indoor hard-court match at 09:30 UTC and live scoreboards already carrying the fixture. That makes the market’s 100% YES reading less about abstract form and more about whether the final is completed cleanly rather than abandoned or pushed outside the settlement rules.[2][4][7]
The historical frame points to a fairly even matchup despite the lopsided crowd price: bookmakers and odds trackers have had Tarvet as a narrow favourite, with one preview putting him around 1.43 and Broom around 2.58, while another feed showed roughly 1.42 versus 2.85.[1][14] Both players also arrived off straight-sets wins in the same event, and the final has been treated as a likely two-set match rather than a long grind, which supports why a “match to finish” outcome is the base case rather than an upset-driven one.[1][9][18]
For traders, the main catalysts are straightforward: completion status, any sign of retirement or walkover, and whether the final is delayed long enough to fall into the market’s 50-50 fallback rules. Roehampton finals are being tracked on live score services and ITF-linked viewing listings, so the practical watchpoints are the official score feed, any tournament schedule change, and whether the match stays on court without a stoppage beyond the seven-day window.[2][4][17]
Methodology
We track ITF Roehampton: Charles Broom vs Oliver Tarvet across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- 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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