Pronóstico: National Bank Open: Mariano Navone vs Arthur Fils

Platform comparison

Market context

Arthur Fils is priced at **0% YES** on this Polymarket contract, so the market is effectively treating his advance as not yet reflected in the order book even though the event is a live ATP third-round match on the National Bank Open schedule. The contract settles in **USDC on Polygon** through conditional tokens, and it only resolves to a named player if that player actually advances; if the match is not played, ends tied, or slips beyond the seven-day rule without a winner, it reverts to **50-50** under the market terms.

The tennis context favours reading this as a hard-court, ranking-driven matchup rather than a pure head-to-head story. Fils is the higher-ranked player in tournament listings, and his season profile has been stronger overall, while Navone’s record has been built more on clay than on faster surfaces[6][2]. They have met once before, with Navone winning their 2022 Challenger match on clay, but that result carries limited weight for this surface and level[3][11].

For traders, the main catalysts are practical rather than speculative: whether the match has already started, whether it is completed cleanly, and whether any schedule change pushes it inside or outside the seven-day settlement window. Tournament draw updates, official match-order changes, and any retirement or suspension are the key dependencies, because Polymarket’s outcome depends on the recorded advance rather than the scoreline alone. Recent match listings show the fixture in the third round with both players active in the draw, which means the contract’s real risk is administrative or weather-related delay rather than a pre-match cancellation[6][16].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: National Bank Open: Mariano Navone vs Arthur Fils 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 Polymarket Qué Es, 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 Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.