Granby: Murphy Cassone vs Tristan Schoolkate

Platform comparison

Market context

Murphy Cassone and Tristan Schoolkate are set to face off in a Challenger-level tennis match at Granby, originally scheduled for 13 July 2026. In prediction markets, a YES share represents a bet that the specified outcome will occur, while a NO share bets it will not; here, the market asks whether Murphy Cassone will advance past Schoolkate. The current crowd-implied probability sits at 100% YES, suggesting traders are virtually certain Cassone will win, despite external betting data indicating Schoolkate holds a 58% chance of victory according to 1XBet’s pre-match odds [2].

Historically, such extreme probabilities in tennis markets often signal either a mispriced event or a match that has already concluded off-market, as genuine 100% certainty is rare before play begins. Comparable cases in ATP Challenger tournaments show that when crowd sentiment diverges sharply from professional bookmaker odds—like the 42% versus 58% split seen here [2]—the market usually corrects once live results or official confirmations emerge. This discrepancy frames the current 100% YES as an outlier that warrants scrutiny rather than blind acceptance.

Traders should monitor official tournament announcements for match completion status, as the market resolves to 50-50 if the match is cancelled, delayed beyond seven days, or if the first set is not completed [1]. Key catalysts include the official result posted by the Granby tournament organisers and any retirement or disqualification notices, which would immediately determine the outcome if the match begins but is not fully played [1]. With the settlement window ending on 20 July 2026, timely updates from the event’s official channel will be the primary driver of price movement.

Sources: 1 · 2

Methodology

This page reviews Granby: Murphy Cassone vs Tristan Schoolkate across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Market UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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 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 Prediction Market UK 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.