National Bank Open: Nicolas Mejia vs Martin Landaluce

Platform comparison

Market context

Nicolas Mejia and Martin Landaluce meet in the National Bank Open first round, and the market’s **84% YES** price on Mejia implies he is a solid favourite rather than a certainty. The pair have no prior head-to-head meetings, which makes recent form and surface-specific numbers more important than any direct matchup edge. Flashscore lists Landaluce at ATP No. 63 and Mejia at No. 131, and also notes that Mejia is in his first Masters main draw while still searching for a first main-draw win on tour-level hard courts[2][11].

Historical comparables point towards a matchup where Landaluce’s ranking and hard-court profile justify his shorter price on exchange-style books, but not enough to make the market one-sided. TennisStats shows both players have been competitive over the last 12 months, with Mejia at 62.1% and Landaluce at 54.7%, while also indicating Landaluce is stronger on hard courts in the recent sample[1]. That kind of split is the sort of detail that can keep Polymarket prices near a probabilistic forecast, whereas Kalshi and Betfair typically present the same view as either a yes/no contract or decimal odds, and Smarkets tends to reflect the same underlying view with commission included. KYC access also differs: regulated betting exchanges and sportsbooks usually require fuller identity checks than crypto-native prediction venues.

The key catalysts are scheduling and tournament logistics rather than deep injury news. The match was listed for 2 August, with some live listings still attaching to 3 August local time, so traders should watch for official order-of-play updates, rain delays and any draw re-seeding that could shift the start time or push settlement closer to the seven-day window[2][10][12]. Because the market resolves to 50-50 if the match is not played, is tied, or is delayed beyond seven days without a winner, the main risk is not an upset but a postponement or cancellation. On Polymarket, that tail risk is priced directly; on Betfair or Smarkets, the same scenario is filtered through odds movement and commission, while Kalshi’s contract structure makes the event date and completion rules more explicit.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares National Bank Open: Nicolas Mejia vs Martin Landaluce specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.