Philadelphia: Simona Waltert vs Fiona Crawley

Platform comparison

Market context

Polymarket is pricing this Philadelphia women’s singles match at 0% YES, which leaves the contract effectively dead until the market gets a confirmed winner or falls into its fallback resolution path. The market refers to Simona Waltert against Fiona Crawley at the Ennoble Care Philly Open, a WTA 125 event on outdoor hard courts in Philadelphia, with Waltert listed as the higher-ranked seed and Crawley the lower-ranked home player.[1][2][7]

For context, this sort of contract usually hinges less on pre-match strength than on whether the tie is actually played and formally completed within the settlement window. Waltert entered the event around world No. 87, while Crawley was around No. 266–267, and the pair had no prior head-to-head record before this meeting; that ranking gap is why most pre-match models and match listings leaned Waltert, but Polymarket’s 0% price points to the on-chain market seeing the outcome as already effectively locked or unrecoverable.[2][3][11][15]

A trader should watch for three things: whether the match was officially completed, whether either player withdrew or retired, and whether the tournament schedule changes affect the settlement date. The match was listed for 24 August 2026, and source pages showed it as live/scheduled on that date, so any delayed completion, walkover, or abandonment matters because Polymarket settles via USDC on Polygon using conditional tokens, and a non-result by 7 September 2026 would force the 50-50 fallback.[2][4][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Philadelphia: Simona Waltert vs Fiona Crawley across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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.

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.

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%.