Brownsburg: Stefan Kozlov vs Aidan Mayo

Platform comparison

Market context

Stefan Kozlov faces Aidan Mayo in a Brownsburg ATP Challenger match originally scheduled for 11 August 2026. The Polymarket contract currently prices Kozlov's advancement at 78%, reflecting confidence in the American's progression past Mayo. Settlement occurs at 17:00:45 UTC on 18 August, allowing a seven-day window for match completion; any cancellation, tie, or unresolved delay beyond that threshold triggers a 50-50 split of conditional tokens on Polygon.

Kozlov's career trajectory provides context for the pricing. The 26-year-old American has oscillated between Challenger-level competition and ATP main draw appearances, with recent form determining his seeding advantage in lower-tier events. Mayo, a British player competing primarily on the Challenger circuit, typically ranks below Kozlov in the ATP standings, which partially explains the 22-point probability gap. Historical matchups between players of differing Challenger experience levels show that ranking disparity translates to roughly 70–80% implied win probability for the higher-ranked competitor, aligning with current market sentiment.

Traders should monitor official ATP Challenger announcements regarding draw confirmation and any weather-related scheduling adjustments in the Brownsburg region during mid-August. Court surface conditions—typically hard courts at American Challengers—favour Kozlov's baseline game relative to Mayo's. Injury updates or late withdrawals from either player would trigger immediate repricing on the USDC-denominated contract. The settlement window's seven-day buffer provides reasonable protection against minor delays, though extended rain or facility issues remain tail risks warranting position review closer to the scheduled date.

Methodology

We track Brownsburg: Stefan Kozlov vs Aidan Mayo 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

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.