Piracicaba: Maximo Zeitune vs Nicolas Zanellato

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Market context

The real-world event is the ATP Challenger tennis match between Maximo Zeitune and Nicolas Zanellato in Piracicaba, Brazil, originally scheduled for 23 June 2026 but now confirmed to have taken place on 25 June 2026 on clay at Quadra 3. In prediction markets, a YES share pays out if the market resolves to the named outcome (here, that Zeitune advances), while a NO share pays out if it does not; the current 100% YES price implies the market has already settled with Zeitune winning, as game reports confirm Zanellato defeated Zeitune 0–1, meaning the market should resolve to Zanellato, not Zeitune, creating a critical discrepancy between the crowd-implied probability and the actual result[5].

Historically, markets with 100% pricing before official results are often mispriced due to delayed data feeds or premature settlement assumptions, as seen in prior ATP Challenger events where walkovers or cancellations were initially misreported as completed matches, leading to temporary 100% prices that corrected once official scores were published[2]. Traders should watch for the official ATP Tour head-to-head confirmation and the final match report from Tennis.com, which lists the Round 1 result and confirms the winner, to verify whether the market has truly settled or if the 100% price reflects a data error[1][7].

The key catalyst is the publication of the definitive match result by the ATP Tour, which will override any preliminary scores and determine the final resolution; recent updates from RoyalScore and Sofascore show the match concluded on 25 June with Zanellato winning, directly contradicting the 100% YES price for Zeitune[3][4]. Traders must monitor the official ATP announcement for any delays beyond seven days or cancellations, which would trigger a 50–50 resolution, though current evidence indicates the match was completed without such issues[2]. The settlement window ending 30 June 2026 provides a final deadline for this correction to be enforced.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Market UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Market UK, 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.

Is this market available outside the US?

Prediction Market UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market UK triggers a quick verification flow that finishes in minutes.