Bad Homburg Open: Liudmila Samsonova vs Katerina Siniakova

Platform comparison

Active sub-markets

Market context

The WTA Bad Homburg Open match between Liudmila Samsonova and Katerina Siniakova is set to begin today at 5:00 AM ET on Centre Court, with the current crowd-implied probability sitting at a precise 50-50 split for Samsonova advancing. On Polymarket, this contract trades as a conditional token on the Polygon network, where USDC liquidity reflects the on-chain mechanics of a true coin-flip scenario rather than a clear favourite. The market resolves to Samsonova if she wins, to Siniakova if she advances, and to 50-50 if the match is cancelled, tied, or delayed beyond seven days without a winner.

Historical precedent frames this 50% probability as a logical outcome given their previous encounter at this venue. In the 2024 Round of 16 at Bad Homburg, Siniakova defeated Samsonova 6-3, 6-7(3), 6-3 on grass, a result that established a competitive balance between the two players on this specific surface [1][8]. That match featured a tight second set where Samsonova lost only by three points, suggesting that while Siniakova holds the grass-court edge here, Samsonova remains capable of pushing the contest to a decisive third set, validating the current equal pricing.

Traders should monitor the live start time and any weather-related delays, as the tournament schedule is tight and the Centre Court surface is sensitive to moisture. With Samsonova ranked 37 and Siniakova 34 in the WTA standings, the slight ranking difference is negligible compared to their head-to-head history on grass [3]. Recent tournament coverage confirms the match is live today, but no major injury announcements have been released yet, meaning the 50% price will likely hold until the first serve is struck [2][5]. Any delay beyond the seven-day threshold would automatically trigger the 50-50 settlement, a key dependency for conditional token holders.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Bad Homburg Open: Liudmila Samsonova vs Katerina Siniakova on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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?

On Kalshi UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 it cost to trade on Kalshi UK?

Zero. Kalshi UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.