National Bank Open: Duncan Chan vs Thiago Agustin Tirante

Platform comparison

Market context

Duncan Chan’s meeting with Thiago Agustin Tirante is a first-round men’s singles match at the National Bank Open in Montréal, with Tirante the clear pre-match favourite in conventional tennis markets. Tennis.com had Tirante at 73% projected to win against Chan’s 27%, while other listings put Tirante’s outright price in the low-1.3s and Chan near 3.5, which is broadly consistent with a market that should normally sit well above a coin flip. [1][15]

That is why a **0% YES** crowd-implied price on a binary prediction market looks less like a view on tennis ability and more like a market microstructure artefact, especially if trading has been thin or the contract has not yet refreshed around the delayed start. On Polymarket, the price is shown directly as an implied probability; on Kalshi and Betfair-style books, traders typically compare the same view through contract pricing or decimal odds, with platform fees and access rules affecting the effective break-even. Betfair and Smarkets also add commission, while U.S.-regulated venues usually require tighter KYC and have more limited state-by-state availability than offshore-style exchanges. [1][14]

The key catalyst is simply whether the match is played to a result before the settlement window closes, because the contract resolves to Tirante only if he advances and to a 50-50 outcome if the match is not played, is tied, or is delayed beyond seven days without a winner. Tournament listings shifted the scheduled date and court assignment, with live fixtures showing play at Montréal’s IGA Stadium and several results pages updating the same pairing across August 3–4, so traders should watch official draw/status changes, court order, and any weather-driven postponement rather than the pre-match price alone. [7][10][13][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares National Bank Open: Duncan Chan vs Thiago Agustin Tirante 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 Kalshi Alternative, 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

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

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.

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.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.