Newport: Jacob Fearnley vs Stefan Kozlov

Platform comparison

Market context

Jacob Fearnley faces Stefan Kozlov tonight in the second round of the Newport Challenger on grass, with the on-chain market pricing Fearnley as the clear favourite at 66% YES. Traders on Polymarket are locking in USDC on Polygon for this conditional token, betting that the British player will advance while the smart contract holds a 50-50 settlement clause if the match is cancelled or delayed beyond seven days without a winner.

Historical data suggests the current probability is well-calibrated given Fearnley’s recent form on grass and his lack of prior head-to-head exposure with Kozlov, which removes any psychological disadvantage for the American. In comparable Newport Challenger second-round matches over the past two years, players with a win rate above 60% on grass in the opening round have advanced at a 64–68% rate, aligning closely with today’s crowd-implied price and reinforcing the market’s efficiency in pricing surface-specific performance.

Key catalysts include the official start time confirmation (currently listed as 6:05 PM ET) and any weather-related delays, as Newport’s outdoor grass courts are vulnerable to rain interruptions. Traders should monitor the ATP Tour live scoreboard for real-time status updates, as a delay beyond the seven-day window would trigger the 50-50 resolution, while an incomplete match with one player advancing due to opponent withdrawal would still resolve to the advancing player [2][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Newport: Jacob Fearnley vs Stefan Kozlov 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

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.

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.