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 |
|---|---|
| Completed Match | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 1 Winner | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 2 O/U 8.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Total Sets: O/U 2.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 1 O/U 8.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Match O/U 21.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 2 O/U 9.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Match O/U 22.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 2 O/U 10.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Match O/U 23.5 | 100% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura | 0% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set Handicap +/-1.5 | 0% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 2 Winner | 0% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set Handicap +/-1.5 | 0% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 1 O/U 9.5 | 0% |
| ITF M15 Tianjin 2 Men: Matthew Dellavedova vs Kosuke Ogura Set 1 O/U 10.5 | 0% |
Market context
Matthew Dellavedova, an Australian professional tennis player, faces Kosuke Ogura of Japan in an ITF Men's 15 tournament qualifier in Tianjin, originally scheduled for 14 August 2026. The match settlement hinges on a clear winner advancing from this lower-tier professional circuit event. The 0% crowd probability suggests either minimal trading activity or strong consensus that Dellavedova will not progress, though such extreme readings on niche tennis markets often reflect low liquidity rather than genuine predictive certainty.
ITF M15 events sit at the foundation of professional tennis rankings, drawing developing players and those rebuilding ranking points after injury or career breaks. Historical patterns show these matches carry higher volatility than ATP-level fixtures; upsets occur frequently due to inconsistent form, travel fatigue, and the qualifying format's compressed scheduling. Comparable low-liquidity tennis markets on decentralised platforms typically see probability shifts of 20–40 percentage points once trading volume increases, suggesting the current 0% reading may not reflect genuine match dynamics.
Key variables for traders include confirmation of both players' entry into the draw, any late withdrawals or illness announcements, and weather disruptions affecting the Tianjin venue in mid-August. Recent ITF tournament reports via Tennis Explorer and ATP databases should be monitored for Dellavedova's recent form and Ogura's head-to-head record. The settlement window extends to 22 August, allowing seven days beyond the scheduled date before a 50-50 resolution triggers; any match delay or cancellation would activate this clause. USDC settlement mechanics mean traders should track whether the match actually begins, as incomplete matches trigger the tie resolution rather than a winner determination.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
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.
- 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.
- 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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