Philadelphia: Simona Waltert vs Fiona Crawley

Platform comparison

Market context

The Philadelphia meeting between Simona Waltert and Fiona Crawley was listed for 24 August on hard court, with Waltert the clear pre-match favourite in outside markets and Crawley priced as the underdog. Sportsbooks clustered around Waltert at about 1.44-1.49, which implies roughly a mid-60s win probability, broadly in line with trader consensus rather than a major split in opinion.[5][10][11]

That makes the current 0% YES crowd view on this contract look like a stale or inactive price rather than a live reflection of match quality. Comparable pre-match models and tip lines also leaned Waltert, with projected win chances ranging from the low-60s to high-60s and some set-betting models favouring a straight-sets result, so the market logic has consistently pointed one way even if the contract has not been repriced.[3][11][14]

For traders, the key drivers are straightforward: whether the match actually began on schedule, whether completion was delayed, and whether an official winner was recorded before the settlement deadline. Live listings showed the match on court in Philadelphia on 24 August, with score feeds and schedules updating through the day, so the main catalyst is not form news but confirmation of completion versus a suspension, cancellation, or unplayed status that would force a 50-50 outcome.[1][2][4][13]

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 Best Prediction Markets, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

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.