National Bank Open: Caty McNally vs Alexandra Eala

Platform comparison

Market context

Polymarket is pricing Caty McNally vs Alexandra Eala at **43% YES** today, which implies a slight edge to McNally on the contract rather than a clear market lean. On Polymarket, the outcome is settled with USDC on Polygon via conditional tokens, so the price reflects the market’s live view of who advances from this match, with a 50-50 fallback if the contest is not played, ends level, or is delayed beyond the specified window without a winner.

The read-through from form and market comparables is mixed rather than decisive. Alexandra Eala is the higher-ranked player and Tennis.com’s pre-match model had her as a strong favourite, projecting her at **68%** versus McNally’s **32%**.[2] That sits alongside broader season indicators that are closer than the ranking gap suggests: TennisRatio lists Eala at **38-26** over the past 52 weeks and McNally at **42-22**, while also showing McNally with the stronger hard-court career record of the two.[1] There is no meaningful head-to-head history to anchor the price, so traders are mostly weighing current level, surface fit, and the likelihood of a straightforward finish.[1][4]

The main catalysts are straightforward: official start time, any court assignment or schedule change, and whether the match is completed inside the 7-day settlement tolerance if weather or prior-round delays intervene. National Bank Open and live-score pages currently list the fixture as an upcoming Toronto match, with scoreboards updating once play begins.[10][8] For a Polymarket user, the practical watchpoint is not just who wins points, but whether the match is actually played to completion before the market’s resolution rules force a 50-50 outcome.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Caty McNally vs Alexandra Eala 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

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

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.

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.

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.