Philadelphia: Fiona Crawley vs Julia Grabher

Platform comparison

Market context

Fiona Crawley’s quarter-final against Julia Grabher in Philadelphia is priced very differently across markets: the prediction contract sits at 6% YES for Crawley, while sportsbook and tennis-site pricing point closer to Grabher as the firmer favourite. TennisTemple had Grabher at about 83.4% in live win probability during the match, Tennis.com projected Grabher 54% to Crawley’s 46%, and a sportsbook line shown at Loto-Québec implied roughly 60% for Grabher at 1.65 versus 1.85 for Crawley.[2][7][11]

The probability makes more sense when set against the pair’s profiles and the draw. Grabher entered Philadelphia as the higher-ranked player, around WTA No. 114 live, while Crawley was around No. 264 live, and the WTA 125 draw also showed Crawley from the lower half of the ranking pool against a player with a stronger tour-level record.[1][10] That gap is enough to justify a favourite, but not a complete mismatch, especially in a best-of-three match where service holds and short stretches of momentum can swing pricing quickly.[1][10]

Traders should watch for official completion status, because the market resolves to 50-50 if the match is not finished by 11 September 2026, and anything cancelled or never played also leads to 50-50. The match was listed as suspended on 27 August, so the key catalysts are any resumption announcement, final score confirmation, or a draw update from the tournament; until then, cross-platform odds remain more informative than the contract alone.[2][10]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Philadelphia: Fiona Crawley vs Julia Grabher across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.