Granby: Justin Boulais vs Zhizhen Zhang

Platform comparison

Market context

The Granby tournament will host a match between Canadian qualifier Justin Boulais and Chinese player Zhizhen Zhang on 13 July 2026, with the conditional token currently trading at 100% implied probability for Boulais advancing. On Polygon, USDC holders are pricing this as a certainty, though the settlement window extends to 20 July to account for potential delays or cancellations that would trigger the 50-50 resolution clause.

Historical precedent suggests extreme probabilities in lower-tier ATP Challenger matches often reflect incomplete information rather than genuine certainty. Boulais, ranked outside the top 200, faces Zhang, a player with inconsistent results on the secondary tour. Similar matchups between unseeded Canadians and mid-ranking Chinese competitors have produced upsets at roughly 15–20% frequency across comparable Challenger events over the past three years. The 100% pricing likely reflects either significant late-breaking information about Zhang's withdrawal or injury, or simply thin liquidity in a niche market where small position sizes can skew odds dramatically.

Traders should monitor official ATP Challenger announcements through 12 July for any withdrawal notices, which would resolve the market to 50-50 if the match doesn't occur. Weather disruptions at the Granby venue have delayed matches by several days in previous editions, making the seven-day grace period material. Zhang's recent tournament schedule and any injury reports from the ATP tour database represent the primary catalysts; confirmation of both players' participation 48 hours before scheduled play would likely tighten the current extreme pricing.

Methodology

This page reviews Granby: Justin Boulais vs Zhizhen Zhang 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 PolyGram, 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

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.

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.