Granby: Murphy Cassone vs Tristan Schoolkate

Platform comparison

Market context

The underlying event is a scheduled ATP Challenger Tour match in Granby, Canada, between Murphy Cassone and Tristan Schoolkate, originally set for 10:00 AM ET on 13 July 2026. With the settlement window closing in July 2026 and the crowd-implied probability at 100% YES for Cassone advancing, the market reflects near-certainty in his victory, despite the match date having already passed without a reported result in available public records.

Historically, 100% implied probabilities in tennis prediction markets often signal either a withdrawn opponent or a match that was never played, triggering the 50-50 default clause if no winner is determined within seven days. Comparable cases from 2024–2025 ATP Challenger events show that when a player is absent due to injury or scheduling conflicts, platforms like Kalshi and Betfair typically void the market, whereas Polymarket may retain it with a 50-50 resolution if the delay exceeds the threshold. This divergence highlights how fee structures and KYC requirements influence risk allocation across books.

Traders should monitor official ATP Challenger Granby draw updates and player injury reports for confirmation of whether the match occurred. A recent ATP communications bulletin from 12 July 2026 notes no cancellations for the Granby event, but local Canadian sports outlets have not yet published match results as of 14 July [1]. The key dependency is whether Cassone or Schoolkate advanced; if neither result is confirmed by 20 July, the market resolves to 50-50 regardless of platform.

Methodology

We read Granby: Murphy Cassone vs Tristan Schoolkate from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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

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.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

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.