Granby: Yuta Shimizu vs Jay Dylan Friend

Platform comparison

Market context

Yuta Shimizu faces Jay Dylan Friend in a Granby tournament match originally scheduled for 13 July 2026. The Polymarket contract currently trades at 100% YES, implying near-certain settlement on Shimizu's advancement. This pricing reflects either strong conviction in Shimizu's superiority or minimal liquidity depth; with settlement closing 20 July, traders have a week-long window to observe whether the match executes as planned and how the underlying form develops in the interim.

Granby tournaments typically feature qualifying rounds and main-draw matches with predictable scheduling, though weather delays remain common in July. Shimizu's ranking relative to Friend—and their head-to-head record if one exists—would ordinarily anchor probability estimates. The 100% YES price suggests either Shimizu holds a decisive ranking advantage or Friend is a qualifier with limited recent tournament data. Comparable Polymarket tennis contracts at major events rarely sustain extreme probabilities unless one player is substantially higher-ranked; this extreme reading warrants scrutiny of whether the market reflects genuine disparity or simply thin order books.

Traders should monitor official tournament draws and any player withdrawals announced before the scheduled date. Injury reports, late schedule changes, or weather forecasts issued within 48 hours of play could trigger repricing. The conditional token mechanics on Polygon mean any delay beyond seven days from 13 July—pushing past the 20 July settlement deadline—would trigger an automatic 50-50 resolution, effectively voiding the current probability assumption. Recent ATP and WTA scheduling data from official sources typically becomes firm 72 hours before matches, providing the critical window for position adjustment.

Methodology

We track Granby: Yuta Shimizu vs Jay Dylan Friend across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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'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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.