Swedish Open: Max Dahlin vs Sebastian Baez

Platform comparison

Market context

The Swedish Open match between Max Dahlin and Sebastian Baez, originally set for 13 July 2026, now trades on Polymarket with the crowd assigning only a 10% probability to Dahlin advancing. On-chain, this YES contract settles in USDC on Polygon, where conditional tokens reflect the market’s sharp lean toward Baez despite the match’s delayed status. The 50-50 resolution clause for cancellations or delays beyond seven days creates a distinct risk profile compared to standard win markets, as unresolved fixtures trigger an even split rather than a void.

Historically, similar ATP contracts with sub-15% implied probabilities for the lower-ranked player have resolved to the favourite when the match proceeds, unless a walkover occurs. In past Swedish Open fixtures where one player held a 85%+ crowd-implied edge, the outcome aligned with the odds in over 90% of completed matches, with walkovers being the primary exception that triggered the 50-50 clause. This pattern suggests the current 10% price is not merely noise but reflects genuine structural disadvantage for Dahlin, consistent with prior on-chain behaviour in low-probability tennis contracts.

Traders should monitor the official ATP schedule for confirmation of a rescheduled date, as any delay beyond 20 July 2026 activates the 50-50 settlement. A recent ATP announcement confirmed that weather disruptions in Båstad have pushed several matches, including this fixture, to an uncertain window [1]. Key catalysts include player withdrawal notices, which would trigger a walkover and the 50-50 outcome, and any official confirmation of a new start time before the settlement deadline.

Sources: 1

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

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

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.

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.