Philadelphia: Simona Waltert vs Fiona Crawley

Platform comparison

Market context

Polymarket is pricing this contract at 0% YES, so the market is treating Simona Waltert’s advance as effectively impossible and Fiona Crawley as the only live side in USDC-settled, Polygon-based conditional tokens terms. With the match originally listed for 24 August in Philadelphia, that price reflects the on-chain view of a dormant or broken contract rather than a balanced tennis contest.

Waltert is the higher-ranked player and the seed, while Crawley came in as the underdog, but comparable women’s ITF and WTA 125 matches often shift sharply once schedules harden, withdrawals are confirmed, or a result is posted by the official draw. In practice, Polymarket users read a 0% price as a sign that either the event has already been resolved off-chain, the outcome has been effectively locked in by market activity, or the token path to a Waltert win has been closed.

The main catalysts are administrative rather than form-based: official completion or retirement notice, any late change to the Philly Open order of play, and whether the match is marked finished within the settlement window ending 7 September 2026. The WTA player list shows both players in the Philadelphia 125 field, and third-party live listings have carried the match as scheduled at Court 1, but on this kind of contract the decisive trigger is the recorded advancement status, not scoreline narratives or pre-match odds.

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 Alternative 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.

UK Frequently Asked Questions

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 Alternative 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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.