National Bank Open: Benjamin Bonzi vs Yannick Hanfmann

Platform comparison

Market context

Benjamin Bonzi’s meeting with Yannick Hanfmann at the National Bank Open is a first-round ATP Montréal match on outdoor hard courts, and the market’s 0% crowd-implied probability for a Bonzi win looks far below the form and ranking signal in the available data. Hanfmann is listed around ATP No. 45 in live match feeds, while Bonzi is around the low 100s, and multiple stat pages show Hanfmann with the stronger recent win rate over the past 12 months, alongside a clean 0-0 head-to-head because the pair have not met previously.[1][2][4][11][13]

For platform comparison, Polymarket expresses the outcome directly as a binary probability, while Kalshi typically prices the same event through contract bids and asks that can be translated into an implied probability; Betfair and Smarkets instead show decimal odds, with the same match often carrying a visible market margin once fees are included. In a zero-per-cent screen, the practical question is not whether Bonzi is “impossible”, but whether there is simply no live liquidity or stale quoting, because comparable feeds and odds aggregators have still treated Hanfmann as a clear favourite rather than a coin-flip.[6][12][15]

Traders should watch the actual order of play, because the listed start time has moved across feeds from 23:10 UTC on 2 August to 16:10 UTC on 3 August, which is exactly the kind of scheduling drift that matters for a market whose settlement window runs to 9 August. Any delay beyond seven days from the scheduled date would trigger the market’s tie-style fallback, and if the match is postponed, suspended, or reshuffled due to the tournament schedule, the eventual outcome can depend more on completion rules than on pre-match price.[1][5][9][17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares National Bank Open: Benjamin Bonzi vs Yannick Hanfmann 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.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Kalshi Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

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.