Palermo: Alessandra Mazzola vs Dalila Spiteri

Platform comparison

Market context

The underlying event is a WTA 125 clay-court match between Italian players Alessandra Mazzola and Dalila Spiteri at the Palermo Ladies Open, which concluded on 20 July 2026 with Spiteri winning 2–0 in sets. The match has already been played and decided, meaning the prediction market’s 0% YES probability for Mazzola reflects the settled outcome rather than an unresolved forecast.

Historically, prediction markets that remain open after a match’s completion typically collapse to the actual result once official scores are verified, as seen in similar WTA events where late-resolving markets corrected to 100% for the winner within hours of score confirmation. In this case, the 0% price aligns with Spiteri’s confirmed victory, and no further polling or campaign-finance catalysts apply, since tennis outcomes depend solely on match results, not political declarations or debate schedules.

Traders should monitor the official settlement timestamp against the tournament’s published results page to confirm the market resolves to Spiteri, as the settlement window ends 27 July 2026. With the match already completed and Spiteri advancing, the only relevant dependency is the platform’s verification of the score from the WTA’s official match record, which lists Spiteri as the third-round winner over Mazzola[1]. No further announcements or schedule changes will alter the outcome.

Sources: 1 · 2 · 3 · 4

Methodology

This page tracks Palermo: Alessandra Mazzola vs Dalila Spiteri across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.