Swedish Open: Andrey Rublev vs Sebastian Baez

Platform comparison

Market context

Andrey Rublev faces Sebastian Baez in the quarter-final of the Swedish Open at Bastad today, with the match scheduled to begin shortly. On Polymarket, this contract trades at a 100% implied probability for Rublev advancing, a stark divergence from traditional betting markets that assign him roughly a 59% win chance based on moneyline odds of -178[4][5]. This pricing suggests the crowd views Baez’s withdrawal or a walkover as the only realistic path to a 50-50 resolution, given the specific rule that unplayed walkovers trigger a split settlement rather than a winner declaration[1].

Historically, such 100% pricing on Polymarket often precedes a late-stage injury announcement or a confirmed no-show, mirroring past ATP contracts where conditional tokens on Polygon settled at parity only after official tournament cancellations were confirmed. In comparable cases, traders who ignored the on-chain consensus and bet against the 100% line faced total loss when the event proceeded as the market expected, highlighting the efficiency of USDC liquidity in absorbing late information before the settlement window closes[1].

Traders must monitor the live score feed and official Nordea Open communications for any pre-match withdrawal notices, as Baez’s recent heavy workload in previous rounds could precipitate a late exit[2][6]. The primary catalyst is the 8:00 AM ET start time; if the match does not commence within the seven-day delay window, the contract resolves to 50-50, but any play beginning—even a single serve—locks the outcome to the advancing player[1]. Current previews favour Rublev heavily, reinforcing the market’s conviction that the match will be played and completed[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Swedish Open: Andrey Rublev vs Sebastian Baez across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

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.

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.