Pronóstico: Swedish Open: Andrey Rublev vs Sebastian Baez

Platform comparison

Market context

Andrey Rublev faces Sebastian Baez in the Swedish Open quarter-final today in Bastad, with the match scheduled to begin shortly. On Polymarket, this contract trades at a 100% implied probability for Rublev advancing, reflecting a market that has priced out virtually all uncertainty despite the match not yet being completed. The USDC liquidity sits on Polygon, where conditional tokens will settle automatically once the on-chain oracle confirms the winner, locking in the payout for YES holders if Rublev wins the tie.

Historical precedents for 100% priced tennis contracts usually signal either a confirmed walkover or a severe information lag before a result is public. In prior ATP events where odds collapsed to certainty before play, the resolution often hinged on pre-match withdrawals rather than on-court performance, triggering the market’s 50-50 clause for walkovers as defined in the terms [1]. However, current predictive models from Dimers and The Stats Zone still assign Rublev a 59% win probability based on simulation data, suggesting the 100% price may be an anomaly rather than a reflection of actual match dominance [4][3].

Traders must monitor the live score feed and official tournament announcements for any delay beyond the seven-day settlement window or a first-set interruption, which would force a 50-50 resolution [1]. The immediate catalyst is the start time at 8:00 AM ET; if the match begins and one player advances via injury default after the first set is completed, the market resolves to that player, but any failure to complete the first set resets the odds to parity [1]. Sportschau confirms the match is listed as a quarter-final with no score yet recorded, meaning the 100% price is entirely forward-looking and vulnerable to real-time volatility once play commences [2].

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

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.

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 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.