National Bank Open: Daniel Merida Aguilar vs Learner Tien

Platform comparison

Market context

Learner Tien remains the market favourite, but the 0% YES pricing suggests the contract is already reflecting an outcome that no longer depends on a straightforward win path, or that the market has moved to a state where settlement looks highly unlikely in the standard way. Pre-match and live pricing around this contest consistently had Tien ahead, with bookmakers and prediction models giving him roughly a 65% to 76% win chance before play, while Daniel Merida Aguilar sat in the outsider range.[2][3][10]

That framing is important because this is the sort of ATP hard-court matchup where probabilities can swing sharply if the favourite is under pressure early, but the historical baseline still favours the higher-ranked, more established player. Recent previews cited Tien’s stronger ATP ranking and hard-court form, including a projected draw position in the National Bank Open and modelled advantages over Merida Aguilar.[6][12] At the same time, several price feeds showed Merida Aguilar attracting meaningful underdog support, which is consistent with a live market that can briefly overreact to set score, momentum, or a medical timeout.[1][4][8]

The immediate catalysts are scheduling and match completion rather than long-run form. The market’s settlement rules mean any cancellation, retirement, tie, or delay beyond seven days can force a 50-50 outcome, so traders should watch official ATP or tournament updates, court assignments, and whether the match is played to completion in the stated window.[6] Because the match was originally listed for 11 August and the settlement window runs to 18 August, any rescheduling, walkover, or incomplete finish is more important here than the pre-match favourite/underdog split.[8][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Daniel Merida Aguilar vs Learner Tien across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

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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%.