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 market prices Kozlov at 78 per cent implied probability, positioning him as the clear favourite. Both players operate in the lower-tier professional circuit, where form, surface preference, and recent match rhythm carry outsized weight relative to ranking alone.

Kozlov, an American with previous ATP main-draw experience, has historically shown volatility across different surfaces and competition levels. Mayo, a British player, competes primarily on the Challenger circuit and has built a modest win-loss record against comparable opposition. Historical precedent suggests that when a player with Kozlov's pedigree faces a circuit regular like Mayo on a hard court—Brownsburg's surface—the favourite's probability tends to settle between 70 and 80 per cent, reflecting genuine uncertainty rather than dominance. The current 78 per cent reading aligns with this baseline, leaving limited value in backing Kozlov at standard odds unless recent form data shifts materially.

Traders should monitor late-draw confirmations and injury bulletins through early August, as Challenger fields often see last-minute withdrawals. Surface conditions and weather patterns in Indiana during mid-August can affect hard-court play. Any announcement of either player's participation in a higher-tier event immediately beforehand—or conversely, a string of recent losses—would justify repricing. The settlement window closes 18 August 2026, allowing a seven-day grace period for rescheduling without triggering a 50-50 resolution.

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

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

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.

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.