National Bank Open: Lois Boisson vs Antonia Ruzic

Platform comparison

Market context

Polymarket is pricing **Lois Boisson** at 73% to advance, so the contract is trading like a fairly strong favourite despite the underlying match being a first-round WTA 1000 meeting on hard courts in Toronto. On Polymarket, buyers are holding conditional tokens on Polygon and settling in USDC, so the market is effectively asking whether Boisson progresses before the 7-day deadline or whether the event falls into the contract’s fallback outcome if play is abandoned or left unresolved.

That 73% looks richer than the pre-match tennis framing in the public numbers. Boisson is the lower-ranked player at No. 292, while Ružić is No. 55 and listed as the favourite by several tennis and odds feeds, with no previous head-to-head between them.[1][10][12] Comparable cases on this kind of market often show that crowd pricing can diverge from the raw ranking gap when traders expect a retirement, withdrawal, or an in-play swing that the headline pre-match odds do not capture. If the match is started but not finished, the settlement will depend on which player advances, so the path to resolution matters as much as who looked stronger on paper.

For traders, the key catalysts are the official schedule, court assignment, and any weather or medical updates from Toronto. The match was listed for 2 August on Court 4, and one live feed already showed a rain interruption in the same pairing, which is relevant because a delay beyond seven days would push the market to 50-50 under the contract rules.[1][5][6] Any late cancellation, walkover, or resumption timing from the National Bank Open could move the price quickly, especially with the short settlement window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Lois Boisson vs Antonia Ruzic 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 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 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.