Sion: Tommaso Compagnucci vs Max Dahlin

Platform comparison

Market context

A tennis match between Italian player Tommaso Compagnucci and Swedish player Max Dahlin is scheduled for the Sion tournament on 17 August 2026. In prediction markets, a YES share represents a bet that Compagnucci advances past Dahlin; a NO share bets on Dahlin's progression. The current market shows 100% implied probability for Compagnucci, meaning traders are pricing him as a near-certain winner. This extreme skew typically reflects either substantial public information about player form, ranking disparity, or head-to-head record—or it signals an illiquid market where few trades have occurred.

Compagnucci and Dahlin occupy different tiers of professional tennis. Compagnucci, ranked around 400–500 on the ATP circuit, has competed in Challenger events across Europe with modest consistency. Dahlin, a Swedish player with a lower ranking, has limited ATP exposure and primarily contests Challenger and ITF tournaments. When ranking gaps exceed 200 positions, the higher-ranked player wins approximately 75–85% of matches at Challenger level, though upsets remain common in lower-tier events. The 100% probability assigned here exceeds historical win rates for such matchups, suggesting either incomplete market participation or strong confidence in Compagnucci's condition.

Traders should monitor official tournament draws and any withdrawal announcements from the ATP or Sion tournament organisers through mid-August. Injury reports, recent match results, and surface conditions in Sion (typically clay) will influence actual match dynamics. The settlement window closes 24 August 2026; matches delayed beyond 7 days without completion trigger a 50-50 resolution, protecting against indefinite postponement risk.

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 Prediction Market UK, 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.

UK Frequently Asked Questions

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 Prediction Market UK. 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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.