Istanbul 2: Petr Bar Biryukov vs Paul Inchauspe

Platform comparison

Market context

Petr Bar Biryukov’s meeting with Paul Inchauspe in Istanbul sits in the first round/round of 32 of a Challenger event, and the contract is still pricing at **0% YES** despite the match being listed for 4 August with live coverage pages already up.[1][2][3] That gap looks extreme versus the public tennis sites, which treat the fixture as imminent rather than void, so the market is effectively saying the path to a clear winner is still close to nil even though the event appears on the schedule.[1][4]

Recent form signals are mixed but not close to a binary case. One live-score page gives Biryukov an ATP ranking around the high 200s while Inchauspe sits far lower, but that same page also flags Biryukov’s recent losses and Inchauspe’s better short-run record, which explains why some external tennis models lean towards Inchauspe rather than a clean favourite outcome for Biryukov.[2][4][5] For a comparison with sportsbook-style framing, Flashscore is already listing odds, but the market’s 0% implied probability is far more sceptical than a normal pre-match price and may reflect uncertainty around whether the match was actually completed or advanced on schedule.[3]

The key catalysts are straightforward: official draw/status updates, whether the match was played on the announced Court B slot, and any post-match walkover, retirement or schedule slippage before the settlement window closes.[1][2][9] If the fixture was delayed, suspended or never started, that matters more than pre-match form because the contract resolves to 50-50 if no winner is determined within seven days of the scheduled date, so traders should watch ATP/event feeds and live-score updates for confirmation of an on-court result.[1][3]

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 Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

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 Kalshi vs Polymarket. 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.