Wimbledon WTA: Katerina Siniakova vs Nikola Bartunkova

Platform comparison

Market context

Katerina Siniakova faces Nikola Bartunkova in the second round of the 2026 Wimbledon WTA, with the match scheduled to begin at 10:00 UTC on 1 July in London. Siniakova, a seasoned doubles specialist, advanced comfortably after saving seven breakpoints and defeating Zheng Qinwen 6-4, 6-4 in the opening round[4]. Bartunkova, a rising talent, recently secured a notable win against defending champion Frech at the GDLOpen[8]. The crowd-implied probability of 0% for Siniakova winning suggests the market is pricing in an extreme outlier scenario, possibly a walkover or cancellation before play commences.

Historically, 0% probabilities in tennis markets rarely reflect genuine skill disparities but instead signal unresolved pre-match conditions, such as injury withdrawals or administrative cancellations. In comparable cases at Wimbledon, markets with near-zero odds have resolved to fair prices when matches failed to start due to player injury or walkovers[2]. Traders approaching this programmatically should monitor conditional order triggers tied to match-start signals, as resolution rules specify a fair-price outcome if no ball is played[2]. The catalysts to watch include official WTA injury reports, court assignment updates, and any last-minute player status announcements, particularly given the tight 24-hour window before the scheduled start[7]. Recent coverage from Tennis Tonic identifies Siniakova as the pick to win in three sets, reinforcing that the 0% figure is likely a market anomaly rather than a skill-based assessment[1].

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 Polymarket App 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

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 Polymarket App UK. 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.

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.

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.