Lexington: Sebastian Gorzny vs Borna Gojo

Platform comparison

Market context

Sebastian Gorzny’s Lexington meeting with Borna Gojo is being priced as close to a foregone conclusion by the contract, with the market sitting at **100% YES** for the settled side while the live sportsbook range still shows Gojo as a clear but not absolute favourite. Kalshi’s Lexington contract has Gojo around **72–73%**, while bookmaker-style pricing in the results cluster is generally tighter than the market’s implied certainty, with Gojo quoted around **1.22–1.30** and Gorzny around **3.20–3.80**, implying roughly an 77–82% favourite once margins are stripped out.[14][5][7][2]

That gap matters because comparable markets on the same pair have previously shown large but not perfect skew towards Gojo rather than a binary certainty. Earlier August and July listings consistently made Gojo the short-priced side, but not at anything like a 100% probability: Tennis Tonic’s preview had Gojo at **1.25** versus **3.48** for Gorzny, BetClan modelled Gojo at **73%**, and Polymarket’s earlier Gorzny-Gojo event also sat near a **99¢** Gojo price rather than a full lock.[2][6][18] In other words, the current contract looks much more extreme than the surrounding analyst and sportsbook consensus, which still leaves some room for match-level variance.

The main catalysts are procedural rather than performance-based: confirmation that the Lexington Round of 16 match actually starts, whether the draw and order of play hold, and whether either player withdraws, retires, or the match is pushed outside the seven-day settlement window. The market only resolves to 50-50 if the match is not played at all, ends tied, or is delayed beyond seven days without a winner, so late scheduling changes matter as much as on-court form. Tennis.com lists the contest as a Round 2 match in Lexington, while the contract’s settlement window runs to 12 August, which leaves a small but real operational risk if the event is disrupted.[19][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Lexington: Sebastian Gorzny vs Borna Gojo 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 PolyGram, which mirrors the Polymarket order book at 0% fees.

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.

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 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.