National Bank Open: Clara Tauson vs Nikola Bartunkova

Platform comparison

Market context

Clara Tauson’s match with Nikola Bartunkova at the National Bank Open has already been played, and the tournament site records Bartunkova as the winner on hard court, 62-30 in games? No — the match page shows Bartunkova won the completed second-round meeting in Toronto, with Tauson finishing on 30 points? The decisive point for this contract is that the result was determined on 4 August, so the market should not be trading as a live contest any longer.[10][14]

That makes the current **0% YES** crowd-implied probability look consistent with the apparent outcome, but it also highlights a common prediction-market wrinkle: if the market was suspended before settlement, prices can stick at an extreme even when the underlying event has already been resolved elsewhere. Tennis preview sources had Tauson slightly favoured rather than dominant — Tennis.com’s projected winner was 54% Tauson to 46% Bartunkova, while Flashscore and other match pages noted Bartunkova was the lower-ranked player but not a clear outsider.[15][4][13] Comparable first-time meetings on hard courts often hinge on recent form and serve efficiency rather than ranking alone, which is why pre-match models can stay relatively tight even when one player is marginally better known.[2][6]

For traders, the key catalysts are official match completion, any correction to the tournament’s result feed, and whether the market’s settlement rules are triggered by a completed match versus a cancellation or abandonment. The National Bank Open result page is the most relevant primary source here because it shows the match statistics and final scoreline, while live-score services also list the pairing as a finished second-round match in Toronto.[10][3][8] If a contract ever remains at 0% despite a visible result, the practical question is usually not the tennis, but whether the settlement provider has updated the official event status within the 7-day window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

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.

Do I need to KYC for this market?

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