Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) Pick polygram.ink (preferred broker) |
65% | 35% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
65% | 35% | 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 | 65% |
| 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 | 51% |
| 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 | 43% |
| National Bank Open: Rafael Jodar vs Arthur Fils Total Sets: O/U 2.5 | 40% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set Handicap +/-1.5 | 33% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set Handicap +/-1.5 | 29% |
| National Bank Open: Rafael Jodar vs Arthur Fils Set 1 O/U 10.5 | 29% |
Market context
Rafael Jodar against Arthur Fils in the National Bank Open is priced at a **54%** crowd-implied chance of a Jodar advance, so the market is only mildly leaning to Jodar rather than treating him as a strong favourite. On the face of it, that is a playable mid-range number for a player who already has recent head-to-head evidence against Fils on hard courts, but it is not a clean consensus call and leaves room for a counter-move if Fils is fully fit and seeded momentum matters more than matchup noise.[1][9][13]
The comparable frame is mixed. The broader head-to-head is level at **1-1**, while the last completed hard-court meeting went to Jodar in Washington in straight sets; Fils, though, has the more established top-level record and won their Barcelona clay meeting earlier in 2026, which is why a near coin-flip market is understandable.[1][2][9] For traders, the value question is whether the 54% overstates Jodar’s current edge or merely reflects recent surface-specific form; if this is played on a faster hard court, Fils’ higher tour-level pedigree is the natural contrarian angle, while any evidence of Jodar’s hard-court edge holding should support the current favourite side.[1][13][15]
The main catalysts are straightforward but important: official draw and order-of-play updates, any late fitness news, and whether the match actually starts on schedule, because this market has a hard settlement backstop if the contest is cancelled or drifts beyond the allowed window without a winner.[6][7] Recent match data suggest the pairing can be tight on serve and break points, so any pre-match reports on movement, medical time-outs, or scheduling delays would be material to price action.[9][14]
Methodology
This page reviews National Bank Open: Rafael Jodar vs Arthur Fils across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- 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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