Granby: Yuta Shimizu vs Jay Dylan Friend

Platform comparison

Market context

A tennis match between Yuta Shimizu and Jay Dylan Friend is scheduled for 13 July 2026 at 10:00 AM ET in Granby, with settlement occurring by 20 July. The current 100% implied probability suggests either exceptional clarity on one player's form or sparse trading volume, both common conditions in lower-tier professional tennis fixtures where liquidity concentrates around major tour events.

Shimizu and Friend operate in the Challenger and ITF circuit ecosystem, where match outcomes depend heavily on surface preference, recent tournament results, and head-to-head records. Historical patterns in this tier show that 100% probabilities typically reflect either a significant ranking gap, recent dominant performances by the favoured player, or minimal market participation. Without established ATP rankings separating these competitors, traders should cross-reference recent ITF results and Challenger draws from June 2026 to assess whether the probability reflects genuine form divergence or merely thin order books. The settlement window's seven-day tolerance for delays is material here—Granby fixtures occasionally face weather disruptions or scheduling conflicts that could trigger the 50-50 resolution clause.

Programmatically, this market warrants conditional order logic tied to official tournament draw confirmations and player withdrawal announcements. Monitor Granby tournament communications and the ATP/ITF official calendars for any schedule shifts beyond 20 July. Given the extreme probability skew, arbitrage opportunities may exist if either player withdraws or if injury reports surface before 13 July, creating discrepancies between this market and related betting instruments. Track entry-level tennis news feeds for late-stage scratches, which remain common in lower-tier events.

Methodology

This page reviews Granby: Yuta Shimizu vs Jay Dylan Friend 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 Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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'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.

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.

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.