Istanbul 2: Antoine Ghibaudo vs Ilia Simakin

Platform comparison

Market context

Polymarket is pricing the Ghibaudo–Simakin contract at **0% YES**, which leaves the market effectively saying the on-chain conditional token has no chance of settling to Antoine Ghibaudo at current levels. On Polymarket, users buy and sell USDC-denominated positions on Polygon, so the contract price reflects both the expected tennis result and the market’s view of settlement risk under the event rules, including the 50-50 outcome if the match is not completed, cancelled, or pushed beyond the seven-day window. The listed fixture is the Istanbul II Challenger semi-final between Antoine Ghibaudo and Ilia Simakin, scheduled for 8 August 2026, with live score services showing the match as underway from 12:00 UTC in Istanbul.[1][3][7]

A 0% read is unusually extreme for a live tennis match, but it can occur when traders believe the named outcome is already functionally dead, or when the contract has drifted towards the fallback settlement rather than a decisive winner. Comparable tennis markets often reprice sharply once a favourite is broken early, retires, or fails to complete the match, because Polymarket’s settlement depends on the official advance, not just who looked stronger on court. H2H data here are thin: one stats source says there are no past match-ups, while another preview still frames Simakin as the shorter-priced runner in pre-match odds, which helps explain why the crowd may have been willing to lean away from Ghibaudo before play settled the issue.[8][11][16]

The main catalysts now are straightforward: the ATP Challenger scoreline, any retirement or walkover note, and whether the tournament publishes an official completion result before the market’s settlement window closes on 15 August 2026 at 13:00 UTC. Because Polymarket resolves from the actual advance, traders should watch for updates from live scoreboards and the event desk, especially if weather, scheduling backlogs, or a partial match completion create a path to the 50-50 fallback rather than a clean winner.[1][2][7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Istanbul 2: Antoine Ghibaudo vs Ilia Simakin 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.

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.