National Bank Open: Caty McNally vs Alexandra Eala

Platform comparison

Market context

Caty McNally and Alexandra Eala are set to meet at the National Bank Open, with the market currently pricing Eala at about two-thirds to advance and McNally at roughly one-third. That is close to Tennis.com’s model view, which lists Eala as a 68% projected winner and McNally at 32%, while the crowd-implied probability in this contract sits at 33% for McNally, broadly in line with the same direction but a touch more bullish than the tennis-specific projection[2].

The historical frame is mixed rather than one-sided. There is no prior head-to-head at tour level, so traders are leaning on form and surface indicators instead of direct matchup history[3][4]. Eala’s 2026 numbers are stronger on hard courts and she has been more efficient against top-50 calibre opposition, while McNally arrives with the better recent overall win rate across the past 12 months and a more established doubles and singles profile than her ranking alone suggests[1][4]. That combination explains why most pre-match models leave McNally live, but still behind the Filipina on a hard court[1][4][6].

The main catalysts are scheduling and whether the fixture is actually played on the listed date, because the contract resolves to 50-50 if it is cancelled, tied, or delayed beyond seven days without a winner. The National Bank Open match pages and live scoreboards indicate the contest is on the Toronto hard-court schedule, but the market remains sensitive to walkovers, late withdrawals and order-of-play changes common at WTA 1000 events[2][13][14]. For comparison, any fresh movement in sportsbook pricing or live tournament updates would matter more than abstract form data here, because the contract only cares which player advances, not margin or set score[2][13].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Caty McNally vs Alexandra Eala 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 Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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

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 Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Best Prediction Markets 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.