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, with the match originally scheduled for 13 July 2026 but currently showing no result as of 14 July. On Polymarket, the contract for Tsitsipas advancing is priced at 100% YES, implying near-certainty he will win, yet this contradicts all major predictive models. Sportsbooks and analytics firms uniformly favour Buse: Bleacher Nation lists him as the favourite at -140 odds with a 58.3% implied win chance [7], while Dimers’ simulation model assigns Buse a 53% probability of victory [6]. Tennis Tonic and The Stats Zone also tip Buse to win in three sets [3][5].

Historically, such extreme Polymarket pricing (100% YES) in tennis markets has occurred only when a match is effectively decided before play—either via withdrawal or administrative cancellation favouring one player. In comparable ATP cases, 100% pricing resolved to the advancing player only when the opponent failed to appear, not when the match was contested. Here, the match is listed as 0–0 on Sportschau with a 15:00 start time on 14 July, indicating it is still pending [2]. The 100% price likely reflects a market inefficiency or delayed settlement logic rather than actual match outcome certainty.

Traders should monitor the official ATP Gstaad schedule and live score feeds for confirmation of play commencement. A key catalyst is whether Buse withdraws or fails to appear, which would trigger the 100% YES resolution for Tsitsipas. Conversely, if the match proceeds as scheduled, the current price is misaligned with the 53–58% win probability models favouring Buse [6][7]. Watch for any withdrawal announcements from the tournament’s official site or ATP social channels before the 15:00 CET start.

Sources: 1 · 2 · 3 · 4 · 5

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 PolyGram, which mirrors the Polymarket order book directly.

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

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 PolyGram 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.