Swiss Open: Stefanos Tsitsipas vs Ignacio Buse

Platform comparison

Market context

Stefanos Tsitsipas faces Ignacio Buse in the opening round of the Swiss Open Gstaad, a match originally slated for 13 July but now live on 14 July. While the prediction market for Tsitsipas advancing sits at a 100% implied probability, this stands in stark contrast to the broader sportsbook consensus, which heavily favours Buse. Traditional bookmakers list Buse as the favourite with odds of -140, translating to a 58.3% win probability, whereas Tsitsipas is the underdog at +110 [6].

Historical precedents in prediction markets often reveal significant divergence when crowd sentiment clashes with quantitative models, frequently leading to arbitrage opportunities or eventual price corrections. In this specific contract, the 100% YES price for Tsitsipas ignores advanced simulation data from Dimers, which assigns Buse a 53% chance of victory, and tips from The Stats Zone and Tennis Tonic, both predicting a three-set win for the Peruvian [4][5]. Such a total disconnect between the market price and the analyst consensus suggests the contract may be mispriced relative to the underlying event probability.

Traders should monitor the official match result on Sportschau, where the Round of 32 is currently listed as 0-0 at 15:00 local time, to confirm if play has commenced or been delayed [2]. Any announcement regarding a postponement beyond the seven-day settlement window would trigger the market’s 50-50 resolution clause, overriding the current odds. Given the live status of the match and the overwhelming expert consensus favouring Buse, the 100% probability for Tsitsipas appears vulnerable to a rapid correction once the outcome is confirmed.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Swiss Open: Stefanos Tsitsipas vs Ignacio Buse 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

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

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.

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.