Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
71% | 29% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
71% | 29% | 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: Coco Gauff vs Elena Rybakina Set 1 O/U 8.5 | 71% |
| National Bank Open: Coco Gauff vs Elena Rybakina | 55% |
| National Bank Open: Coco Gauff vs Elena Rybakina Match O/U 21.5 | 55% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set 2 Winner | 54% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set 1 Winner | 54% |
| Completed Match | 50% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set 2 O/U 8.5 | 50% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set 2 O/U 9.5 | 50% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set 2 O/U 10.5 | 50% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set 1 O/U 9.5 | 48% |
| National Bank Open: Coco Gauff vs Elena Rybakina Match O/U 22.5 | 48% |
| National Bank Open: Coco Gauff vs Elena Rybakina Match O/U 23.5 | 44% |
| National Bank Open: Coco Gauff vs Elena Rybakina Total Sets: O/U 2.5 | 42% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set Handicap +/-1.5 | 34% |
| National Bank Open: Coco Gauff vs Elena Rybakina Set 1 O/U 10.5 | 26% |
Market context
The National Bank Open hard-court tournament in Montreal will feature a second-round clash between Coco Gauff and Elena Rybakina on 12 August 2026. Gauff enters as the higher seed and has dominated their recent head-to-head record, winning four of their last five meetings across 2024 and 2025. Rybakina, however, remains a formidable opponent on fast courts where her serve and flat groundstrokes pose genuine threats. The 55% probability favouring Gauff reflects her current ranking advantage and recent form, though the margin suggests meaningful uncertainty about court conditions and match-day variables.
Historical context shows that Gauff's record against top-20 opponents on hard courts has strengthened considerably since 2024, with her win rate exceeding 60% in such fixtures. Rybakina's performance at the National Bank Open specifically has been inconsistent—she reached the semi-final in 2023 but exited early in 2024. The current odds align with Gauff's established superiority in this matchup, though not dramatically so, reflecting that Rybakina's explosive baseline game and serve remain capable of disrupting any opponent on any given day.
Traders should monitor injury reports through the week preceding the tournament, particularly any concerns affecting either player's movement or serve. Weather conditions in Montreal—humidity and temperature shifts—can significantly alter how the hard court plays and favour either Gauff's consistency or Rybakina's power. Tournament scheduling changes or first-round results affecting either player's confidence and fatigue levels will also influence match dynamics. The settlement window closes on 20 August, providing a nine-day window for the match to conclude without triggering the tie-resolution clause.
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 Prediction Today, which mirrors the Polymarket order book directly.
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
- 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 Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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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