National Bank Open: Duncan Chan vs Thiago Agustin Tirante

Platform comparison

Market context

The National Bank Open match between Duncan Chan and Thiago Agustin Tirante is priced by the crowd as a **0%** yes outcome, so the market is effectively treating Chan as a near-impossible winner and Tirante as the clear favourite. That is an extreme reading, and in tennis markets it usually reflects either a major information gap, a mismatch in ranking and tour-level experience, or a stale line rather than a genuinely zero-probability spot. Chan’s public record is thin at ATP level, with ESPN listing no ATP Tour singles wins and only minimal career prize money, while his college record shows solid recent form that has not yet translated into a sustained pro-level résumé[1][2][3].

For handicappers, the comparable-case frame is simple: markets that sit at or near zero often overstate consensus when one player is far less established, but they can still be efficient if the underdog is stepping up from lower-tier events. Chan’s profile points to a player who has won consistently in collegiate tennis and has shown decent hard-court results in lower-level events, which can create some contrarian appeal if the draw is weaker than expected or if Tirante is coming in with fitness or scheduling issues[3][6][9]. The value question is therefore not whether Chan is the more proven name — he is not — but whether the market has pushed his chance too far towards the floor.

The main catalysts to watch are the official order of play, any late withdrawal or walkover, and whether the match actually takes place within the settlement window; if it is not played, or is delayed beyond seven days without a winner, the market resolves 50-50 by rule. As of the latest available listings, Chan is an active player with recent hard-court appearances, but the decisive angle is whether the tournament confirms the matchup and whether Tirante’s side of the draw remains intact, because any cancellation, retirement before completion, or schedule reshuffle can matter more here than fine-grained form data[10][11][13].

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.

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.

Do I need to KYC for this market?

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

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.