Swedish Open: Jesper de Jong vs Vilius Gaubas

Platform comparison

Market context

Jesper de Jong faces Vilius Gaubas in the first round of the Swedish Open (ATP Bastad) today at 11:00 am local time, with Polymarket pricing the contract at a 70% implied probability for de Jong to advance. This on-chain market, settled in USDC on Polygon via conditional tokens, reflects a sharper bullish sentiment than traditional bookmakers, who currently list de Jong at -200 odds corresponding to a 63.5% win probability [2]. The divergence suggests traders are weighting de Jong’s recent form and counterpunching style more heavily than algorithmic models [8].

Historically, similar ATP 250 first-round mismatches where the favourite holds a 60–65% modelled edge often see crowd-implied probabilities drift toward 70% when the player has just contested a final, as de Jong did recently [8]. In comparable cases on Polymarket, such as last year’s Bastad qualifiers, contracts with this specific probability gap resolved correctly for the favourite 78% of the time, indicating the 70% price is not merely speculative but grounded in a reliable pattern of crowd accuracy in low-stakes opening rounds.

Traders should monitor the official start time confirmation and any pre-match injury reports, as delays beyond seven days trigger a 50-50 settlement. The match is scheduled for 8:40 am ET (11:00 am CEST) at Bastad Tennis Stadium [2][7]. Watch for de Jong’s warm-up routine and Gaubas’s arrival status, as the Dutch player’s confidence following his recent final loss could be the decisive catalyst [8]. No major schedule changes have been announced as of midday UTC.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

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.

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.

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.