SSC Napoli vs. Udinese Calcio

Platform comparison

Active sub-markets

Market context

Napoli will travel to the Stadio Friuli to face Udinese on 24 May 2026 in a Serie A fixture scheduled for the final day of the Italian top-flight season. The 100% implied probability reflects the near-certainty that this match will occur as scheduled, barring extraordinary circumstances such as severe weather, security threats, or administrative intervention—events rare enough that most prediction platforms price them into the noise. Across Polymarket, Kalshi, Betfair, and Smarkets, this type of fixture-occurrence market typically settles YES unless the match is officially postponed or cancelled; the platforms' settlement criteria remain functionally identical, though Kalshi's regulatory framework in the US and Polymarket's Ethereum-based infrastructure mean different user bases and fee structures (Kalshi charges a flat commission; Polymarket takes a 2% fee on winnings). Betfair and Smarkets, operating under UK gambling licences, offer decimal odds displays that some traders find more intuitive than percentage-based implied probabilities.

Historical precedent shows that Serie A matches scheduled for the final day rarely fail to proceed. In the 2024–25 season, all 380 fixtures completed as planned despite fixture congestion and injury concerns. The only material risk factors for this May 2026 encounter would be a stadium-safety closure, which has not occurred in Serie A since 2018, or an administrative sanction affecting either club's participation—highly unlikely for a routine league match. Traders monitoring this market should watch for any official Serie A or Italian Football Federation (FIGC) announcements regarding schedule changes, typically issued via their website or major sports news outlets such as Sky Italia or Gazzetta dello Sport, though such announcements are rare within two weeks of a fixture.

Methodology

We read SSC Napoli vs. Udinese Calcio from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. 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.