Bad Homburg Open: Alexandra Eala vs Elise Mertens

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Active sub-markets

Market context

Polymarket is pricing this Alexandra Eala v Elise Mertens contract at **100% YES**, which means the market is effectively treating a Mertens advance as a near-certainty on the Polygon-based conditional token. On the on-chain side, buyers are still holding USDC-settled exposure until the market resolves from the official WTA result, so the key point is not the abstract tournament headline but whether this specific first-round match is completed in a way that produces a clear winner before the settlement window closes.[1]

That reading is best framed against how tennis markets usually behave when the fixture is already underway or has been reported as live: once a match result is effectively known, Polymarket contracts can pin to one side and stay there unless an interruption creates a path to the 50-50 fallback. Here, the contract language matters because a cancellation, no contest, or delay beyond seven days without a winner would not settle to either player, but to 50-50 instead.[1] Public live-score listings and match coverage indicate Eala v Mertens was scheduled and then played in Bad Homburg, with Mertens already carrying the kind of WTA-level profile that makes her a conventional favourite in first-round grass-court pricing.[2][4][7]

For traders, the practical catalysts are straightforward: watch for any official WTA score update, retirement, suspension, or redraw notice, because those determine whether the conditional tokens settle to Eala, Mertens, or the fallback outcome.[1] A recent live match listing also suggests the contest has been on court rather than merely announced, which reduces the importance of pre-match speculation and increases the relevance of completion status, scoreline, and any post-match official result feed.[7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

Is this market available outside the US?

Kalshi 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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.