Sion: Sandro Kopp vs Benjamin Hassan

Platform comparison

Market context

Sandro Kopp and Benjamin Hassan are scheduled to compete in a professional tennis match in Sion on 19 August 2026, with the settlement window closing on 26 August. The 0% implied probability on the YES side (Kopp advancing) suggests either strong market confidence in Hassan or minimal trading activity on this contract. Given the fixture's early morning start time (4:00 AM ET), liquidity constraints and information asymmetries may be depressing the market's ability to price Kopp's chances accurately.

Comparable lower-tier ATP or Challenger-level matches typically see wider probability ranges when one player is ranked substantially higher or possesses a documented head-to-head advantage. Hassan's apparent favouritism in the market context warrants examination of recent form data, ranking trajectories, and any previous meetings between the pair. Swiss domestic tournaments often attract regional players with limited international exposure, which can create pricing inefficiencies when sportsbooks and prediction markets diverge on baseline expectations.

Traders should monitor tournament draws and player withdrawal announcements through late August, as schedule changes or injury disclosures could trigger market repricing. The settlement window's seven-day grace period means matches delayed beyond 26 August would resolve to 50-50, creating a tail risk for either side. Recent ATP Challenger results and Hassan's performance in lead-up matches will provide concrete data points; any significant ranking shifts or confidence indicators from official tour communications should be tracked closely before the scheduled date.

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 Best Prediction Markets, which mirrors the Polymarket order book directly.

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.

FAQ

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.