National Bank Open: Nicolas Mejia vs Martin Landaluce

Platform comparison

Market context

This is the first-round National Bank Open match between **Nicolás Mejía** and **Martín Landaluce** on hard court, with the market currently pricing a Mejía win at 14% despite Landaluce being the higher-ranked player on the event card. Their head-to-head is **0-0**, so there is no direct matchup history to anchor the price; the market is instead reading off broader form, surface fit and tournament-level context.[3][10][13]

For comparable cases, the most useful framing is that a lower-ranked player can still trade well when the favourite is younger, relatively unproven at ATP level, or has uneven hard-court results. Flashscore lists Landaluce around ATP 63 and Mejía around ATP 131, while also noting Mejía is making a first-ever Masters main-draw appearance and is still **0-3** in main-draw hard-court tour-level matches.[3][10] At the same time, Landaluce has compiled a **14-11** record against opponents ranked outside the top 100 this season, which supports why he is the shorter price, but not enough to eliminate upset risk in a one-off opener.[3]

A power-user approach is to treat this as a live dependency tree: monitor confirmed start time, any court reassignment, and whether the match is moved or suspended, because non-completion or a delay beyond seven days resolves the market to 50-50 under the rules. Programmatically, the key inputs are official order-of-play updates, live score feeds, and late withdrawal notices; if the match begins but is unfinished, settlement depends on whether one player advances before the window closes. Current pre-match probability remains low on Mejía, so any price movement would likely come from schedule changes, pre-match medical or withdrawal news, or a sharp shift in exchange liquidity rather than from head-to-head evidence.[2][3][7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Nicolas Mejia vs Martin Landaluce 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.

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.