Granby: Tyler Zink vs Alexis Galarneau

Platform comparison

Market context

Tyler Zink faces Alexis Galarneau in the second round of the ATP Challenger at Les Championnats Banque Nationale de Granby, with the match originally scheduled for 10:00 AM ET on 15 July 2026. Current tennis modelling projects Galarneau as the favourite, assigning him a 66% chance of victory against Zink’s 34% [1]. This divergence is stark: the prediction market implies a 0% probability for Zink advancing, whereas sportsbook and algorithmic consensus still leaves him a meaningful contender, suggesting either a pricing error or an unpublicised factor such as injury or withdrawal.

Historically, prediction markets showing 0% implied probability on a player with a 34% projected win rate often signal a late withdrawal or administrative cancellation rather than pure performance odds. In comparable ATP Challenger cases, such extreme dislocation between modelled probability and market price has preceded matches being voided or resolved to the 50-50 contingency clause, particularly when one player fails to appear after the odds have collapsed [2]. Traders should treat this as a binary event on participation rather than match outcome.

Key catalysts include official ATP Challenger Granby draw updates and any player status announcements before the settlement window closes on 22 July 2026. If Zink is listed as absent from the Round 2 fixture on the tournament’s official match page, the 0% price will likely hold; if he appears but the match is delayed beyond seven days, the contract resolves to 50-50 [1]. Monitor Tennis365 and Tennis.com for real-time H2H and status confirmations, as these are the primary sources for validating whether the match will proceed [2][3].

Sources: 1 · 2 · 3

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 Best Prediction Markets. 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 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.