Swedish Open: Jesper de Jong vs Sebastian Baez

Platform comparison

Market context

Jesper de Jong faces Sebastian Baez in the Round of 16 at the Swedish Open in Båstad, with the match scheduled to begin shortly. On Polymarket, this contract currently trades at a 51% implied probability for de Jong advancing, reflecting a tight contest where the crowd barely favours the Dutchman over the Argentine. The market settles on USDC via Polygon, using conditional tokens to lock in exposure to the winner, with a 50-50 resolution clause if the match is cancelled or delayed beyond seven days without a result.

Historical data from predictive models aligns closely with the current crowd price, creating a stable framing for traders. Dimers’ advanced tennis simulation assigns de Jong a 54% win probability, while another model projects a 52% chance, both slightly higher than the market’s 51% [3][7]. Tennis.com’s projection leans marginally toward Baez at 52%, suggesting the market is efficiently pricing the slight uncertainty between two competing algorithmic views [4]. This convergence of model outputs around the 51–54% range indicates the price is not an outlier but a consensus reflection of the players’ relative form.

Traders should monitor the official start time and any pre-match injury updates, as walkovers or cancellations trigger the fair-price resolution rule [6]. The match is set for 14:30 local time in Båstad, and any delay beyond this window could shift liquidity toward the 50-50 outcome. Sportschau confirms both players are listed as 0–0 in sets, indicating the match has not yet commenced [2]. With $15.17K in volume already recorded, the market is active, and price movements will likely hinge on real-time confirmation of player availability just before the first serve [5].

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 Kalshi UK, 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

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.

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 Kalshi UK 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.