Swiss Open: Stefanos Tsitsipas vs Ignacio Buse

Platform comparison

Market context

Stefanos Tsitsipas faces Ignacio Buse in the first round of the Swiss Open Gstaad, a match originally scheduled for 13 July 2026 but now underway on 14 July. While the prediction market on Polymarket shows a 100% implied probability that Tsitsipas advances, this starkly contradicts the broader sportsbook consensus and analyst models, which overwhelmingly favour Buse.

Historical precedents in ATP events show that when prediction markets assign near-certain odds to a lower-ranked player advancing, they often signal a cancelled match or a pre-match withdrawal rather than a genuine on-court upset. In this case, Buse is ranked No. 33 compared to Tsitsipas at No. 85, yet multiple independent models give Buse a 52–53% win probability, with sportsbooks pricing him as the clear favourite at –140 odds [5][6][7]. The 100% YES line on the contract suggests the market may be misinterpreting the settlement rules or reacting to non-played match assumptions rather than live tennis probability.

Traders should monitor the official match status on Sportschau and real-time score updates, as the match is listed as 0–0 at 15:00 local time on 14 July [2]. Any announcement of cancellation, delay beyond seven days, or incomplete play without a winner would trigger the 50–50 settlement clause, rendering the current 100% probability invalid [1]. With Buse tipped to win in three sets by Tennis Tonic and The Stats Zone, the divergence between the prediction market and live odds presents a clear arbitrage signal if the match proceeds as scheduled [3][4].

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

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.

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'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 PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.