Livesport Prague Open, Qualification: Sofia Costoulas vs Ayla Aksu

Platform comparison

Market context

Sofia Costoulas has already defeated Ayla Aksu in the Livesport Prague Open qualification, winning 2–0 with set scores of 7–5 and 6–2 on 19 July 2026. The match is completed, and official WTA statistics confirm Costoulas advanced to the next round [1][2]. In prediction markets, a YES share represents a bet that the stated outcome will occur, while a NO share bets it will not; here, the outcome “Sofia Costoulas advances” has already happened, so the 100% YES price reflects certainty based on settled facts.

Historically, markets that resolve after an event concludes—especially when official results are published hours or days earlier—lock at extreme probabilities like 100% because no new information can alter the outcome. Comparable cases in tennis prediction markets show that once a match result is confirmed by the WTA, prices converge instantly to the true outcome, eliminating arbitrage and volatility [3]. This market’s settlement window ending in 2026 is irrelevant to the price, as the event is already resolved.

Traders should monitor the official WTA match statistics page for the final confirmation of Costoulas’s advancement, though this is already documented [1][2]. No further announcements, schedule changes, or dependencies affect this market, as the match cannot be replayed or overturned under standard WTA rules. The only remaining risk is a technical error in data reporting, which is negligible given the multiple independent sources confirming the result [4].

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 Prediction Market UK, which mirrors the Polymarket order book directly.

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

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.

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.