Granby: Nicolas Arseneault vs Andres Martin

Platform comparison

Market context

Nicolas Arseneault faces Andres Martin in the opening round of the Granby Challenger on 13 July 2026, with the prediction market currently pricing Arseneault’s advancement at a 25% implied probability. This low valuation contrasts sharply with typical sportsbook lines for Challenger-level matches, where underdogs rarely carry odds implying such a steep disadvantage unless significant form or fitness concerns exist. Notably, the two players have no prior head-to-head record, suggesting this is their first encounter on court [1].

Historically, 25% implied probabilities in Challenger events often signal a mismatch in ranking or recent performance, yet Arseneault’s career win rate of 54% and current ATP ranking of 674 do not indicate a complete lack of competitiveness [4][10]. Comparable cases from recent Challenger tournaments show that when unranked or lower-ranked players face opponents with similar career win percentages, the market often corrects within 24 hours of the match, especially if no injury news emerges. The divergence here may reflect a lag in sportsbook adjustment rather than a genuine consensus on Martin’s superiority.

Traders should monitor official ATP Challenger entry confirmations and any late injury updates from either player’s team, as these are the primary catalysts for probability shifts in this window. The match is scheduled for 10:00 AM ET, and any delay beyond seven days without a result triggers a 50-50 settlement, adding a time-sensitive risk layer [1]. No recent news sources have reported fitness issues, but the absence of a head-to-head history means early-set performance will be the first real indicator of market mispricing.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Granby: Nicolas Arseneault vs Andres Martin 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 Kalshi vs Polymarket, 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

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 Kalshi vs Polymarket. 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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.