Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) 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 |
|---|---|
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen | 100% |
| Completed Match | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 1 Winner | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Total Sets: O/U 2.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 1 O/U 8.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Match O/U 21.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 2 O/U 8.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Match O/U 22.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 2 O/U 9.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 1 O/U 9.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Match O/U 23.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 2 O/U 10.5 | 100% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 2 Winner | 0% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set Handicap +/-1.5 | 0% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set Handicap +/-1.5 | 0% |
| National Bank Open: Daniel Merida Aguilar vs Alex Michelsen Set 1 O/U 10.5 | 0% |
Market context
Daniel Merida Aguilar’s meeting with Alex Michelsen is trading like a slight upset-on-paper for the Spaniard, with the crowd implying **57%** for Merida Aguilar and **43%** for Michelsen. On recent hard-court evidence, that is a touch against the market consensus: Michelsen beat Merida Aguilar 6-3, 6-4 at Indian Wells in March 2026, and multiple H2H feeds now show him leading the matchup 1-0 on hard courts.[3][8][10] Michelsen is also carrying the stronger hard-court profile this season, with published previews citing a 20-7 hard record in 2026 and a substantial edge in aces and serve power, which supports the favourite case if the match plays normally.[14]
The handicapper’s note, though, is that Merida Aguilar has not been a dead price. Several stat pages show a solid overall 2026 record and competitive return numbers, while one comparison notes his recent form has held up well enough to keep the match closer than a standard ranking gap might suggest.[2][9][16] That is where the value debate sits: the current 57% implies Merida Aguilar as the marginal favourite, but the harder-edged consensus from head-to-head and hard-court data points more towards Michelsen, especially if conditions favour first-strike tennis.[2][4][12]
The key catalysts are straightforward: whether the National Bank Open schedule holds, whether this round-of-32 match is played on the originally listed date, and any late order-of-play or withdrawal news before the settlement window closes.[1][10] If the match is delayed beyond seven days without a result, the market goes 50-50, so traders need to watch for tournament updates as much as player news.[1]
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 Who Will Win, 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
- 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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