National Bank Open: Elina Svitolina vs Iga Swiatek

Platform comparison

Market context

The National Bank Open in Montreal hosts a potential second-round encounter between Ukraine's Elina Svitolina and Poland's Iga Swiatek, scheduled for 12 August 2026. Svitolina, ranked outside the top 20 in recent seasons, faces a formidable opponent in Swiatek, who has consistently held top-five positioning and claimed multiple Grand Slam titles. The 17% implied probability for Svitolina reflects the substantial gap in recent form and head-to-head record, where Swiatek maintains a decisive advantage across hard-court surfaces.

Historical matchups between these players show Swiatek winning their last five encounters, including a 2024 encounter at the same venue. Svitolina's path to victory typically requires Swiatek to underperform on hard courts—a surface where the Polish player's clay-court dominance translates less consistently than on red clay. Comparable upsets at the National Bank Open occur roughly 15–20% of the time when the ranking gap exceeds 15 positions, providing a baseline for evaluating the current odds.

Traders monitoring this market should track injury reports and practice schedules released 48 hours before the match, as both players frequently adjust participation based on cumulative fatigue during the North American hard-court swing. Swiatek's first-round opponent and match duration will influence her physical condition entering this fixture. The settlement window closes 7 August 2026, creating a hard deadline for conditional orders; any match delay beyond 19 August triggers a 50-50 resolution regardless of completion status, a critical parameter for algorithmic position management.

Methodology

We track National Bank Open: Elina Svitolina vs Iga Swiatek 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.

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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.

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