National Bank Open: Lois Boisson vs Antonia Ruzic

Platform comparison

Market context

Lois Boisson’s match with Antonia Ružić at the National Bank Open was set up as a standard WTA 1000 first-round contest on outdoor hard courts in Toronto, and the market’s current 73% crowd price for Boisson is broadly consistent with the rankings gap: Ružić is around world No. 55, while Boisson is down at No. 292.[1][11] For a programmatic read, that means the market is pricing a clear favourite, but not a blowout; in trading terms, the implied edge is large enough that any team automating entries would still want to watch for live-state distortions such as weather delays, retirements, or a rescheduled completion, because the settlement rule can flip to 50-50 if the match is not finished within seven days.[1]

Comparable framing matters here because there is no head-to-head history to anchor a model, so the best comparator is recent form and surface context rather than direct matchup data.[3][14] Ružić arrived with the stronger baseline tour profile and a prior National Bank Open run to the second round, while Boisson’s recent WTA-level returns have been thinner, including only a small number of main-draw wins in 2026.[10][12] That mix helps explain why the crowd has not pushed the price into the 80s despite the ranking spread: the market is leaning on rank and tour results, but the lack of H2H and Boisson’s ability to compete on hard courts leaves some room for uncertainty.[3][11]

For traders using bots, alerts, or conditional orders, the practical catalysts are straightforward: official schedule updates, in-play interruption notices, and confirmation of who actually advances if the match is suspended or completed later.[4][5] Flashscore listed the contest as interrupted due to rain, with a live score at the time of stoppage, which is exactly the kind of state change that matters for a settlement-driven market because a partial match does not automatically resolve to the on-court leader.[4][5] Programmatically, the safest workflow is to key off the tournament feed and the eventual result feed rather than a single live score snapshot, because weather and same-day rescheduling can change both the timing and the settlement outcome.[1][4]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Lois Boisson vs Antonia Ruzic 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 Polymarket Review UK. 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.

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.

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.