Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
66% | 34% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
66% | 34% | 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 |
|---|---|
| National Bank Open: Rafael Jodar vs Arthur Fils Set 1 O/U 8.5 | 66% |
| National Bank Open: Rafael Jodar vs Arthur Fils Match O/U 21.5 | 57% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 1 O/U 9.5 | 55% |
| National Bank Open: Rafael Jodar vs Arthur Fils | 54% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 1 Winner | 52% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 2 Winner | 52% |
| Completed Match | 50% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 2 O/U 8.5 | 50% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 2 O/U 9.5 | 50% |
| National Bank Open: Rafael Jodar vs Arthur Fils Match O/U 22.5 | 50% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 2 O/U 10.5 | 50% |
| National Bank Open: Rafael Jodar vs Arthur Fils Match O/U 23.5 | 44% |
| National Bank Open: Rafael Jodar vs Arthur Fils Total Sets: O/U 2.5 | 41% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set Handicap +/-1.5 | 33% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 1 O/U 10.5 | 30% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set Handicap +/-1.5 | 29% |
Market context
Rafael Jodar and Arthur Fils are due to meet again in Montreal after splitting their two 2026 meetings, which is the key historical frame for the current 54% crowd lean. Jodar won their hard-court clash in Washington 7-6, 6-3, while Fils had earlier won their Barcelona semi-final on clay, 3-6, 6-3, 6-2, so the matchup has already shown a surface split rather than a one-sided edge.[6][7] That kind of record usually justifies a modest favourite price rather than a strong consensus, because the market is weighing a recent upset on the same surface against the broader profile of the higher-ranked player.[6][11]
For traders, the main catalysts are line-up confirmation, any late injury or withdrawal news, and whether either player emerges from the build-up with a changed schedule or reduced workload. The National Bank Open listing currently shows the match as scheduled for 11 August, with no completed in-match statistics yet, which means any market move before play is likely to be driven by availability rather than performance data.[3] Fils’s recent tour results have been strong enough to keep him priced as the higher-ceiling option, but Jodar’s win over him in Washington is the clearest recent comparable and will keep some demand on the underdog side if both are confirmed fit.[6][13]
Methodology
Sports-specific comparison page for National Bank Open: Rafael Jodar vs Arthur Fils. 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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