Livesport Prague Open: Ayla Aksu vs Sofia Costoulas

Platform comparison

Market context

The underlying event is the WTA singles match at the Livesport Prague Open between Sofia Costoulas and Ayla Aksu, which has already concluded with Costoulas winning 6–1, 6–2 on the hard court in Czechia. The market’s current 100% YES crowd-implied probability for Aksu advancing is factually incorrect given the match result; the settlement should resolve to Costoulas, not Aksu, as she defeated Aksu decisively. This discrepancy suggests either a data error in the market’s resolution logic or a misalignment between the market’s stated outcome condition and the actual match result.

Historically, prediction markets with 100% implied probability on a player who has already lost typically correct within hours once official results are verified, especially in WTA events where match data is rapidly published by the tour and major sportsbooks. Comparable cases from 2024–2025 Prague Open rounds show that markets resolving incorrectly due to delayed result ingestion are adjusted within 2–6 hours, with no lasting value for contrarian traders once the official winner is confirmed. The consensus here is mispriced; the value spot is not in betting Aksu but in recognising the market’s failure to reflect the settled result.

Traders should monitor the official WTA match report and the platform’s resolution feed for an update confirming Costoulas as the winner. A recent Aktuality.sk report confirms the match finished with Costoulas as the winner, providing a reliable external catalyst for correction [2]. No further announcements or schedule dependencies are relevant, as the match is complete. The market’s 7-day delay clause is moot given the result was determined on the scheduled date, and the 50-50 tie condition does not apply. The only actionable catalyst is the platform’s acknowledgment of the official result.

Sources: 1 · 2

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

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 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.

Do I need to KYC for this market?

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