Bad Homburg Open: Liudmila Samsonova vs Katerina Siniakova

Platform comparison

Active sub-markets

Market context

Liudmila Samsonova’s meeting with Katerina Siniakova in Bad Homburg is a grass-court match between two players who have already produced close, familiar contests on this surface. Siniakova leads their head-to-head 2-1, and she has beaten Samsonova in Bad Homburg before, including in 2024, which gives her a useful reference point for how the matchup tends to play out on grass.[2][6][7]

The current **100% YES** crowd price is most naturally read as a market leaning on the scheduled start and the absence of any sign that the contest is in doubt, rather than on a detailed performance edge. Bookmaker-style listings also had Samsonova as only a modest favourite, which suggests the market is not pricing an overwhelmingly one-sided tennis case so much as a strong expectation that the match will be completed and settled in the normal way.[9][10]

For traders, the main catalyst is whether the match is actually played on schedule and reaches a completed result before the settlement deadline. WTA and tennis listings place the contest in Bad Homburg on 21 June 2026, while Kalshi specifies resolution from the WTA result, so the key dependency is straightforward: a start, a finish, and a named winner.[3][4][9] If there is a late cancellation, weather disruption on grass, or a delay that pushes the result beyond the seven-day window, the market’s fallback to 50-50 would become relevant.[3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Bad Homburg Open: Liudmila Samsonova vs Katerina Siniakova across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Election Predictions UK routes every trade through to Polymarket — at 0% fees.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

Where can I trade this market with the lowest fees?

On Election Predictions 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.

Is this market available outside the US?

Election Predictions UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.