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 still listed with a **0% YES** crowd price, which makes the market look heavily dislocated against the live tennis data now attached to the fixture. The tournament’s own match page shows the contest as Bonzi vs Hanfmann in Montréal, with Hanfmann seeded higher on ranking metrics: ATP 45 versus Bonzi at 101, while the head-to-head remains **0–0**[2][14]. That combination usually matters in cross-platform comparison pieces because prediction markets can stay pinned near zero when a match has already been delayed, moved, or is treated by traders as unresolved rather than a clean two-way win market.

Comparable data point to a more balanced contest than the contract implies. Tennis sites tracking recent form show Hanfmann with the stronger 2026 hard-court and overall win profile, while Bonzi has had a weaker run of results and has lost his last four matches in one recent form snapshot[3][6]. Independent models also diverge: one live H2H aggregator shows a market-style estimate of roughly 68% for Hanfmann and 32% for Bonzi, which is materially higher than the prediction market’s zero price and suggests the contract is not reflecting tennis probability so much as event-status risk[16].

The key catalysts are administrative rather than tactical: whether the match is formally played, whether the original August 2 slot was pushed back within the seven-day settlement window, and whether the tournament updates the fixture to a completed result before 2026-08-09T23:30:00Z[14]. Recent live-score and tournament pages indicate the match entry remains active, but statistics are still at zeroes, which is consistent with a delay or unstarted fixture rather than a finished result[8][14]. Traders will be watching the National Bank Open schedule feed and any live-score update for confirmation of commencement, because once a match starts but does not finish, the contract’s settlement rules become the decisive factor[14].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets 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.