National Bank Open: Tatjana Maria vs Caty McNally

Platform comparison

Market context

Polymarket is pricing Tatjana Maria against Caty McNally at about **79% YES** for Maria, so the contract is trading as if the German is a clear favourite to advance, with McNally the smaller side of the book. Because the market settles on the player who advances rather than pure match-winning margin, USDC holders on Polygon are effectively expressing a view on the tournament result, with the conditional token resolving to the winner, or to 50-50 if the match is not played or is delayed beyond the market’s timetable.

That pricing sits above most off-chain views in the current market set. Betting feeds and prediction models shown alongside the match have McNally slightly favoured, with moneyline and model estimates clustering around a modest edge for her rather than a Maria-led price.[1][3][12][14] Tennis Temple’s live prediction panel also shows a narrower split than Polymarket, while Tennis.com’s preview gives McNally a 55% projected edge, which suggests the on-chain contract is marking Maria more aggressively than the broader pre-match consensus.[2][3] For a trader, that gap matters because Polymarket is not asking who is stylistically better in the abstract; it is asking whether Maria advances.

The main catalysts are ordinary but important: final order-of-play confirmation, any rain or court delay in Toronto, and whether the match is completed rather than merely started, because an unfinished contest can still trigger the market’s completion rules if one player advances. Recent listings show the fixture as a Round 1 match at the National Bank Open, with start times varying slightly across bookmakers and data sites, which is a reminder to watch official scheduling updates rather than just pre-match price screens.[2][3][15] Any late withdrawal, postponement beyond seven days, or administrative change to the draw would be market-relevant under the contract terms.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Tatjana Maria vs Caty McNally 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 PolyGram, 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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram 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.