National Bank Open: Duncan Chan vs Thiago Agustin Tirante

Platform comparison

Market context

Duncan Chan v Thiago Agustin Tirante is being priced as a near-dead market with a **0% YES** crowd-implied probability, so the handicapper’s read is that the consensus sees Chan as a very unlikely winner. Chan’s public record is thin at ATP level, with ESPN listing a 0–0 singles record in 2025 and Wikipedia showing no meaningful ATP Tour, Grand Slam or Davis Cup body of work beyond ITF results, which fits the profile of an underdog whose true chance is easy for a crowd to underrate only if the draw context is unusually favourable.[1][2]

The comparison that matters is not headline ranking alone, but whether the market is overreacting to unknowns. Chan’s college record at TCU was strong, including a 56–25 career singles mark and a 23–9 senior season, while his tennis-stat profiles point to a player who can hold serve respectably but has limited top-level sample size.[3][6] That leaves room for a contrarian angle if Tirante is carrying poor form or a physical issue, but absent that, the consensus should still sit firmly with the more established tour-level player; with a 0% crowd number, any value case on Chan depends on whether the market has misread how competitive his recent level translates to this matchup.[3][6]

For traders, the main catalysts are late draw and order-of-play updates, plus any pre-match retirement or injury notes that could change the starter entirely. The market description also matters: if the match is not played, ends level, or is delayed beyond seven days without a winner, it resolves 50-50, so postponement risk is itself a live variable until the first ball is struck. The practical watchlist is simple: official tournament scheduling, player availability announcements, and any last-minute withdrawal signals, because a market sitting at 0% YES is usually more vulnerable to venue or fitness surprises than to a straightforward upset.[1][3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Duncan Chan vs Thiago Agustin Tirante 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 Who Will Win 2026, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Who Will Win 2026. 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.