National Bank Open: Daniel Merida Aguilar vs Learner Tien

Platform comparison

Market context

Daniel Merida Aguilar’s quarter-final with Learner Tien at the National Bank Open is priced very differently across venues: the prediction market sits at **3% YES** for Merida Aguilar, while Tennis Tonic’s pre-match odds translated to roughly **61% for Tien** and **39% for Merida Aguilar**, and Tennis.com’s preview had Tien at a **65% projected win probability**.[2][15][16] That gap is notable because the broader tennis numbers still point towards Tien as the stronger player on paper: he is the higher-ranked ATP player, and the French and German TennisTemple listings describe the pair as meeting with Tien around **ATP 17/19** and Merida Aguilar around **ATP 40/63** in live or virtual ranking terms.[3][6] The market’s 3% level therefore looks much closer to a longshot upset price than to a conventional favourite-versus-underdog split.

Historical framing matters here because comparable quarter-final prices in ATP hard-court events usually track ranking, surface performance, and recent form, all of which lean towards Tien. Tennis.com’s event preview specifically cited Tien’s recent ATP 500 title in Geneva and hard-court wins over established opponents as part of his edge, while String Tension’s Elo model also favoured Tien, assigning him about **76.3%** win probability.[13][16] By contrast, one live commentary source noted that Merida Aguilar had built a “dream run” in Montreal, which is the sort of narrative that can narrow trader confidence even when underlying numbers still support the favourite.[14]

For traders, the main catalyst is whether the match actually completes, because settlement depends on a clear winner, while a cancellation, tie, or delay beyond seven days would push the contract to **50-50** under the market rules.[Market description] Schedule updates matter because the match was originally set for 11 August and several listings show it moving in live coverage windows around 12 August local time, which can signal delays rather than a clean result.[8][9][10] If the match is officially commenced and then interrupted, the outcome path remains the key dependency, not the pre-match price alone.[16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.