Sion: Ognjen Milic vs Lucio Ratti

Platform comparison

Market context

Ognjen Milic and Lucio Ratti are scheduled to compete in a tennis match at Sion on 17 August 2026, with the contest originally timetabled for 4:00 AM ET. The 0% implied probability reflects either minimal trading activity or a structural absence of backing for Milic's advancement. Settlement occurs on 24 August, providing a seven-day window for match completion; any delay beyond this threshold without a determined winner triggers a 50-50 resolution, whilst retirement by either player mid-match awards advancement to the opponent.

Both players operate at lower professional tiers where fixture data remains sparse and historical matchup records are often incomplete. Comparable markets on lower-ranked ATP or Challenger-level encounters typically show wider probability ranges when trading volume is thin, suggesting the 0% reading may reflect illiquidity rather than certainty. Conditional order logic would flag this as a liquidity-dependent market: any shift in backing requires monitoring whether new information has emerged or whether the probability simply reflects a lack of counterparty interest.

Traders implementing automated monitoring should track official ATP or tournament draw announcements for Sion, which typically confirm final pairings and scheduling within 48 hours of the event. Weather disruptions at Swiss venues can trigger delays; the seven-day buffer means rescheduling beyond 24 August would force resolution to 50-50. API feeds from tennis databases should be configured to flag retirement announcements or walkover declarations, as these trigger immediate settlement rather than match completion.

Methodology

We track Sion: Ognjen Milic vs Lucio Ratti across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

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 Polymarket Review 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%.