National Bank Open: Gabriel Diallo vs Kyrian Jacquet

Platform comparison

Market context

Gabriel Diallo’s National Bank Open meeting with Kyrian Jacquet is the kind of first-round match that sits between a home favourite and a live qualifier threat. The market is priced at 100% YES for Diallo, but that sits above the main published tennis consensus, which broadly treats him as a favourite rather than a certainty: Tennis Tonic listed Diallo around 1.55 and Jacquet 2.44, implying a much narrower gap than a near-lock, while Rue des Joueurs posted Jacquet at 1.58, showing that some bookmakers and tipsters have read the same matchup in very different ways.[6][11] Diallo is also the Canadian wildcard and Jacquet the qualifier, with the National Bank Open’s own preview describing it as their first career meeting.[4]

For historical framing, the closest comparable cases are first-time ATP meetings where a home wildcard faces a qualifier with little head-to-head data. In those spots, market prices can overreact to local support and ranking gaps, but the actual edge often depends on conditions and whether the favourite can convert service games under pressure. The published tennis feeds show Diallo slightly ahead in live rankings, at ATP No. 108 to Jacquet’s No. 121, which supports a modest favourite status rather than certainty.[1] That matters because a 100% implied probability leaves no room for the ordinary variance that is common in best-of-three tennis, especially when neither player has a prior tour-level head-to-head.[2][4]

The main catalysts now are administrative rather than tactical: whether the match is actually completed within the settlement window, and whether the event schedule is reshuffled. Sportsnet listed the match “not before 7 p.m.” on Sunday evening in Montreal, which suggests timing sensitivity around the original slot, while current match listings show the contest as upcoming rather than already resolved.[8][12][15] For a prediction contract with a 50-50 fallback if the match is not played, delayed beyond seven days, or ends without a winner, any cancellation, withdrawal, or prolonged weather disruption would matter more to pricing than pre-match opinion.[3][16]

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

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 Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

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.