Swedish Open: Andrey Rublev vs Sebastian Baez

Platform comparison

Market context

Andrey Rublev faces Sebastian Baez in the quarterfinal of the ATP Swedish Open at Båstad, with the match scheduled to begin today. The prediction market currently implies a 96% probability that Rublev advances, a figure that significantly exceeds traditional bookmaker and analytics models. Independent predictive analytics suggest Rublev holds roughly a 59% chance of winning, while major bookmakers list him at odds of 1.57, translating to approximately a 64% implied probability [3][4]. This divergence between the 96% crowd-implied figure and the 59–64% consensus from established sources frames the market as potentially overconfident, mirroring historical cases where prediction markets on tennis matches between clear favourites and lower-ranked opponents have inflated win probabilities beyond statistical reality.

Traders evaluating this market programmatically should monitor real-time updates on player fitness and weather conditions, as clay-court matches in Båstad are susceptible to rain delays that could trigger the market’s 50-50 settlement clause if unresolved beyond seven days. Recent previews confirm Rublev is the clear favourite on paper, but the gap between his 60% projected win rate and the market’s 96% implies a pricing inefficiency worth testing with conditional orders or copy-trading bots that exploit mean reversion in overconfident tennis markets [1][3]. Key dependencies include the official start time confirmation and any pre-match injury reports, which could rapidly shift the probability if Baez shows unexpected resilience or Rublev underperforms on the first set, where odds currently favour Rublev at 1.61 [4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Swedish Open: Andrey Rublev vs Sebastian Baez across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Fees, which mirrors the Polymarket order book at 0% fees.

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

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 Fees. 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.

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 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.