National Bank Open: Tereza Valentova vs Taylor Townsend

Platform comparison

Market context

Tereza Valentova v Taylor Townsend is a first-round women’s singles match at the National Bank Open, and the market’s **0% YES** price is sharply below the match-level view on most tennis pricing screens. Tennis.com listed Valentova as the projected winner at **65%** to Townsend’s **35%**, while tennisstats and Tennis Tonic both leaned towards Valentova as the clearer pre-match favourite, with the latter showing early money around **1.59** for Valentova against **2.35** for Townsend.[2][4][9] On that basis, the prediction-market line is materially more sceptical of a Valentova advance than the cross-platform consensus.

Historical framing also points away from a true zero-probability read. The pair have no prior head-to-head record, so traders are relying on form, ranking, and surface rather than direct matchup data.[4] Valentova is the younger player and is ranked **64** in singles, versus Townsend at **105**, although Townsend’s doubles standing is elite and her singles peak has been considerably higher at **46**.[2] Recent form indicators are mixed but not extreme: tennisratio shows Valentova with a stronger last-52-weeks win rate, while Townsend has the longer tour record and more experience against top-100 opposition.[5] In comparable outsider-favourite matchups, prediction markets can drift away from book-based probabilities when the field is thin, but a flat **0%** implies either a stale market or an expectation that the listed favourite has virtually no chance.

The main catalysts are straightforward: whether the match is actually staged, whether the draw order changes, and whether any late withdrawal or walkover is announced before the scheduled start. Flashscore and SofaScore both carried the fixture on 3 August, indicating the contest was at least initially on the board, but any postponement beyond seven days, cancellation, or incomplete result could still trigger the contract’s 50-50 fallback rather than a normal win settlement.[1][3] For traders, the practical watchlist is the official WTA/order-of-play update, any late medical timeout or retirement news, and confirmation that both players remain in the Toronto draw as scheduled.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets, which mirrors the Polymarket order book directly.

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.

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.

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.

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.