Livesport Prague Open: Ayla Aksu vs Sofia Costoulas

Platform comparison

Market context

The WTA 250 qualification match at the Livesport Prague Open between Ayla Aksu and Sofia Costoulas has already concluded on the court, with Sofia Costoulas emerging as the winner. This real-world outcome directly contradicts the current Polymarket price of 100% YES for Aksu, suggesting a significant pricing inefficiency or a lag in on-chain settlement relative to the finished event.

Historically, prediction markets with 100% implied probability on a losing side often stem from delayed oracle updates or conditional token mechanics failing to reflect finished results immediately. In comparable WTA events on Polygon, markets have resolved within hours of match completion once USDC liquidity adjusts to the verified winner, though occasional delays occur if the oracle source requires manual confirmation of the final score.

Traders should monitor the official WTA match result feed and the Livesport Prague Open tournament schedule for any formal announcements regarding match validity or potential delays that could trigger the 50-50 settlement clause. Recent tournament updates confirm the match finished on Czech hard courts, with Costoulas advancing, meaning the primary catalyst for resolution is the oracle’s confirmation of this result rather than further on-court action [1].

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

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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram 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.