National Bank Open: Linda Noskova vs Caty McNally

Platform comparison

Market context

Linda Nosková is playing Caty McNally in the National Bank Open, and the market is currently pricing a Nosková advance at **0% YES** despite external books and prediction tools leaning heavily the other way. Pre-match model prices cited Nosková around 76-78% and McNally around 22-24%, with one Toronto event page listing Nosková as the projected winner at 78% and another sportsbook showing her as a strong favourite at around 1.22 decimal odds[2][11][14][15][16]. For a power-user, that makes this a useful test of whether the market is stale, mis-keyed, or simply waiting for an event-status update rather than reflecting match quality.

Historically, comparable women’s tour markets with one player priced below 25% tend to move quickly once a start time is confirmed, because the live event feed and official score pages usually resolve uncertainty before the market does. If the match is actually underway, the decisive inputs are no longer pre-match probabilities but whether the fixture is completed, suspended, or defaulted; the market rules also matter because no result, a tie, or a delay beyond seven days pushes it to 50-50. The current state of official tennis listings matters here: Tennis.com still labelled the fixture as upcoming with Nosková projected at 78%, while live score pages were already showing match data, which is exactly the kind of inconsistency that can produce odd pricing in programmatic trading setups[2][3][4][13].

The main catalysts to watch are the tournament order of play, any official delay or walkover notice, and whether the match status flips from scheduled to live or completed on the scoring feeds. In practice, a bot or conditional-order workflow should key off the official event state rather than the crowd price: if the tournament confirms the result, the market should follow the winner; if the match is abandoned without a winner, the 50-50 fallback applies. Because the listed start was August 6 at 10:00AM ET and settlement extends to 2026-08-13T14:00:00Z, the critical dependency is whether a valid winner is recorded within that seven-day window rather than how the market is trading intraday[2][11][15].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Linda Noskova vs Caty McNally 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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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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