National Bank Open: Renata Zarazua vs Tamara Korpatsch

Platform comparison

Market context

Renata Zarazua and Tamara Korpatsch were scheduled to meet in the National Bank Open first round, but the key change over the last 24-48 hours is that the market is now effectively pricing a completed result at certainty, with the crowd-implied probability at 100% YES. That usually reflects a match that has been placed on the live schedule and is expected to be decided normally, rather than a cancellation or a delay that would push settlement into the tie-or-void rules.

On comparable form and ranking signals, Korpatsch came into the matchup with the higher WTA ranking, listed around 46th to Zarazua’s 83rd, which is one reason some pre-match models and books leaned towards the German[1][2][6]. At the same time, head-to-head data is thin and mixed across feeds: one source shows Zarazua leading 1-0 overall, while others show no prior completed meetings in the current tournament context, so there is limited historical weight to attach to prior results[3][5][11]. That makes the market more sensitive to immediate scheduling and court conditions than to a deep matchup history.

What traders should watch now is simply whether the round proceeds on court and finishes within the event’s normal timetable. The match was listed for 3 August in Toronto at Sobeys Stadium on outdoor hard courts, with live listings still pointing to an official start window, so any last-minute rain delay, court reshuffle, or medical retirement matters more for settlement than pre-match opinion[2][6][10]. Recent tournament pages also show Zarazua had already completed earlier matches in the draw, which supports the event moving forward rather than stalling, but if this one is not played at all or is delayed beyond the seven-day window without a winner, the contract would revert to 50-50 under the market rules[14][15].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Renata Zarazua vs Tamara Korpatsch 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

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'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.

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.