Iasi Open: Katarzyna Kawa vs Simona Waltert

Platform comparison

Market context

The Iasi Open first-round match between Katarzyna Kawa and Simona Waltert, originally slated for 3:00 AM ET on 13 July, has not yet been played as of Tuesday evening, with the market now pricing Kawa’s advancement at 100% despite pre-tournament odds heavily favouring Waltert. This extreme shift suggests the match may have been delayed or postponed, as no official result has been recorded and both players remain active in the tournament schedule.

Historically, when a prediction market for a tennis match reaches 100% on one player before a result is confirmed, it often signals a cancellation, injury withdrawal, or administrative delay rather than a decisive on-court victory. In comparable WTA events, such probability spikes have preceded matches being rescheduled beyond the settlement window, triggering the 50-50 tie resolution clause rather than a clear winner.

Traders should monitor official WTA communications and the Iasi Open tournament page for updates on match status, particularly any announcements regarding delays, player withdrawals, or rescheduling beyond the seven-day threshold. Recent preview sources had identified Waltert as the clear favourite with a 1.37 odds rating, making the current 100% Kawa pricing a notable anomaly that warrants verification of the match’s actual progress [2][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Iasi Open: Katarzyna Kawa vs Simona Waltert across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.

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 Prediction Today. 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.

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.