National Bank Open: Gabriel Diallo vs Kyrian Jacquet

Platform comparison

Market context

Gabriel Diallo’s first-round match with Kyrian Jacquet at the National Bank Open is the real-world event behind this market, and the current crowd-implied 100% “YES” price points to the view that Diallo has already advanced or is overwhelmingly expected to do so. That is broadly consistent with bookmaker-style pricing available elsewhere: Diallo is listed around 1.55–1.57 in decimal terms, versus Jacquet around 2.38–2.44, which translates to roughly a low-60s favourite for Diallo before any platform-specific vig or fees are considered.[1][10][13]

The comparison with other platforms is mainly about format and frictions rather than direction. Polymarket-style markets quote an implied probability, so a 64¢ to 40¢ split is easier to read directly as a probability gap, while Kalshi uses contracts priced in cents and Betfair/Smarkets typically express the same view as decimal or exchange odds that also reflect commission, liquidity, and local access rules. In practice, the same match can look tighter or looser depending on whether the venue bakes in commission, spread, or lower liquidity, and that is where cross-platform divergence tends to show up most clearly on tennis match markets.[6][14]

The main catalysts are straightforward: whether the match was played on the scheduled Sunday night slot, whether it was completed, and whether any postponement pushed settlement into the fallback rules. Live listings and tournament pages show the fixture scheduled for 2 August at 7:00 pm EDT, with some feeds already marking a live or completed state, so traders should watch official ATP/tournament updates, broadcaster schedules, and any scoreline confirmation before the seven-day delay window becomes relevant.[6][7][8][9] If the result is still unresolved by 9 August 2026 23:00 UTC, the market’s 50-50 contingency becomes the key settlement risk.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares National Bank Open: Gabriel Diallo vs Kyrian Jacquet 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 Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

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 has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Which platform is accessible globally?

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

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets 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.