Palermo: Alessandra Mazzola vs Dalila Spiteri

Platform comparison

Market context

Alessandra Mazzola has already lost to Dalila Spiteri in their Palermo third-round match, with Spiteri winning 2–0 on clay [1]. The market in question, which was originally scheduled for 20 July 2026, now reflects a completed outcome rather than a live contest, explaining the 0% crowd-implied probability for Mazzola advancing. In prediction markets, once a real-world event concludes, probabilities collapse to 0% or 100% depending on the result, and any lingering trading activity is typically speculative or erroneous.

Historically, similar mismatches in WTA 125 events on clay show that pre-match odds often misprice lower-ranked players when surface suitability is overlooked, but post-match resolution is immediate and unambiguous [2]. Traders using conditional orders or copy-trading bots should note that markets tied to completed matches will not reset unless the tournament officially cancels the result—a rare occurrence requiring WTA confirmation. The key catalyst here is not future news but the absence of any rescheduling notice; with the settlement window ending 27 July 2026, the market will resolve to Spiteri unless an official cancellation is declared, which current sources do not indicate [2].

Programmatic approaches to this market would treat the 0% probability as a signal to avoid long positions on Mazzola, instead focusing on liquidity arbitrage if any residual bids exist. Since the match result is confirmed and broadcast records confirm Spiteri’s victory, no further announcements are expected to alter the outcome [3].

Sources: 1 · 2 · 3 · 4

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 Kalshi Fees, 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.

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 Kalshi Fees. 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.

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 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.