Granby: Yuta Shimizu vs Jay Dylan Friend

Platform comparison

Market context

Yuta Shimizu faces Jay Dylan Friend in a Granby tournament match originally set for 13 July 2026, with the settlement window closing 20 July. The 100% implied probability reflects either exceptional clarity around one player's form or a structural absence of recent information that would shift trader conviction. No schedule changes or withdrawals have been reported in the past 48 hours, leaving the market pricing at an extreme that typically signals either a heavily favoured seed or incomplete market participation.

Matches between lower-ranked or less-publicised players often trade at ceiling or floor prices simply because trading volume remains thin. Historical precedent from smaller ATP and Challenger tournaments shows that when implied probability reaches 100%, it frequently reflects the absence of live price discovery rather than genuine certainty. Cancellations, injuries, or late withdrawals in the week before play remain material risks; the 50-50 resolution clause for matches delayed beyond seven days without completion creates a secondary settlement pathway that traders should monitor if any scheduling disruptions emerge.

The critical catalyst is confirmation of both players' participation and fitness status as the match date approaches. Granby tournament announcements, official draw confirmations, and any injury reports from either player's social media or ATP records will be the primary signals. Traders should watch for late withdrawals or schedule shifts—common in July when players manage tournament load—which would immediately rebalance the market away from its current ceiling.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Prediction Today. 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.