National Bank Open: Jaume Munar vs Alexander Blockx

Platform comparison

Market context

Polymarket prices this contract at **50% YES** today, which on the platform means the market is split between Jaume Munar advancing and Alexander Blockx advancing, with settlement handled in USDC on Polygon through conditional tokens. The 50-50 level is also the fallback outcome if the match is not played, ends level, or is delayed beyond the seven-day window from the scheduled date without a winner, so traders are effectively balancing tennis outcome risk against event-completion risk.

The pre-match frame is fairly even. Blockx is listed a few places above Munar in the live rankings across the match listings, with Blockx around ATP 32 and Munar around ATP 43, but they have no prior head-to-head history, which limits how much direct matchup data can be used.[1][2][3][14] Several sportsbooks and preview pages treat the contest as competitive rather than one-sided, with one early tip favouring Blockx and others showing prices close enough to imply a near coin-flip once market margin is stripped out.[11][15][16] That is consistent with a contract sitting at parity rather than decisively in either direction.

The main catalysts are operational as much as sporting: whether the National Bank Open schedule holds, whether this match is actually completed, and whether either player advances via retirement or walkover rather than a full result.[2][4][7] Match pages have already shown shifting start times and court listings, which matters for a market that resolves on advancement rather than just a completed scoreline.[4][7][8] In practical terms, Polymarket users should watch official tournament updates, live scoring feeds, and any late withdrawal or suspension notices, because those can determine whether the contract settles to Munar, Blockx, or the neutral 50-50 outcome.[4][17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Jaume Munar vs Alexander Blockx across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.