Newport: Jacob Fearnley vs Stefan Kozlov

Platform comparison

Market context

The real-world event is the Newport Challenger grass match between Jacob Fearnley and Stefan Kozlov, originally set for 9 July 2026 at 6:05 PM ET, where the market resolves to the player who advances. Current crowd-implied probability sits at 65% YES for Fearnley advancing, reflecting a clear but not overwhelming edge in a contest with no prior head-to-head history between the two players[2][7].

Historically, similar first-time encounters on grass at Newport Challengers have shown that 60–70% implied probabilities often align with actual win rates when the favoured player has recent grass form, as seen in Fearnley’s 6–2, 6–4 qualification win over Mark Lajal at Nottingham 2 in 2024, where he was also the initial pick[3]. Programmatic traders would treat this as a conditional order setup: if live serve speed exceeds 115 mph and first-serve percentage stays above 65%, the model would reinforce the 65% bias, mirroring how bots adjust positions based on real-time performance thresholds rather than static odds.

Key catalysts include the official draw confirmation and any weather-related delays, as grass matches are highly sensitive to moisture and wind; a recent ATP Tour draw update lists both players in the Newport field, confirming the match is still scheduled[5]. Traders should monitor live serve metrics and first-serve percentages via Sofascore or TennisStats, as these are the primary dependencies for Fearnley’s advantage on grass, and any deviation from expected serve performance would signal a shift in the 65% probability[1][2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Bot UK, which mirrors the Polymarket order book directly.

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 Polymarket Bot UK. 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'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 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.