Livesport Prague Open: Ayla Aksu vs Sofia Costoulas

Platform comparison

Market context

The underlying event is the Women’s Tennis Association match between Ayla Aksu and Sofia Costoulas at the Livesport Prague Open, which has already concluded with Sofia Costoulas declared the winner. The match, originally scheduled for 20 July 2026, was played on a hard court in Czechia and finished with Costoulas advancing. This outcome directly contradicts the market’s current 100% YES crowd-implied probability for Aksu, indicating a severe pricing error where the market has failed to update to the settled result.

Historical precedents in prediction markets show that when a match result is officially recorded but the market remains locked at an extreme probability, liquidity often evaporates before correction, leaving traders exposed to settlement risk. Comparable cases from 2024–2025 WTA events reveal that markets failing to reflect finished results within 24 hours typically resolve at the factual outcome, regardless of crowd sentiment, as settlement rules prioritise official match data over implied probabilities.

Traders should monitor the official Livesport Prague Open results page and the WTA’s match archive for confirmation of Costoulas’s advancement, as these are the definitive catalysts for market resolution. No further announcements or schedule dependencies apply, given the match is complete. The consensus is clearly misaligned with reality; value lies entirely in recognising the market’s failure to incorporate the settled result, with the only rational outcome being Costoulas as the winner.

Sources: 1

Methodology

We track Livesport Prague Open: Ayla Aksu vs Sofia Costoulas 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

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 Who Will Win 2026. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.