National Bank Open: Ignacio Buse vs Cameron Norrie

Platform comparison

Market context

Ignacio Buse’s second-round match with Cameron Norrie in Montreal is the event behind this market, and the crowd price of 0% YES is far below the live-book range implied by decimal odds around 1.40-1.50 for Norrie on comparison sites, which translate to roughly 67%-71% before margin. That gap matters across platforms: on Polymarket the displayed figure is a pure crowd-implied probability, while Betfair Exchange-style markets are easier to read as price levels in decimals and Smarkets typically quotes prices with commission in mind, so the same underlying view can look different once fees and spread are included. Buse and Norrie have never met before, and the matchup is on outdoor hard courts at the National Bank Open, where Norrie’s higher tour-level experience has generally made him the stronger pre-match pick.[2][3][7][15][17]

Comparable cases suggest the market should be read with caution because early probabilities can move sharply once the first-round schedule is confirmed and the tennis websites update their live start times. Recent listings placed the match around 12:30 PM ET / 16:10 UTC / 5:45 PM BST, and the fact that different feeds still show slight timing differences is a reminder that weather, court assignment and prior matches can all shift the actual start.[1][8][9] For traders, the key catalysts are whether the ATP and tournament feeds keep the match on the board, whether either player receives a walkover or retirement elsewhere in the draw, and whether the contest begins at all before the settlement window closes; if it is not played or is delayed beyond seven days without a winner, the market resolves to 50-50 under the rules.[1][2]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares National Bank Open: Ignacio Buse vs Cameron Norrie 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 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.

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. 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.