Pronóstico: National Bank Open: Alina Korneeva vs Coco Gauff

Platform comparison

Market context

Polymarket is pricing this National Bank Open match at **8% YES** on the Korneeva side, which means the on-chain market on Polygon is treating Coco Gauff as the strong favourite and assigning only a small chance that Korneeva advances. For a user holding the contract in USDC, the key mechanical point is that settlement follows the market’s binary resolution rules: a completed win for Korneeva pays out the Korneeva side, a completed win for Gauff pays the other side, and cancellation, a tie, or a delay beyond seven days without a winner pushes the contract to 50-50.

That price sits well below mainstream tennis odds and preview models. Bookmakers and preview sites have Gauff around the low- to mid-70s or higher in implied win probability, with several listing her as a clear favourite and projecting a straight-sets win or, at minimum, a match where Korneeva needs to take a set to stay competitive.[1][2][5][6][11][13] Polymarket’s own related tournament page has shown Gauff around 77% versus Korneeva 23%, which is broadly consistent with the external pricing and helps explain why an 8% Korneeva contract looks like a longshot rather than a live coin-flip.[3]

For traders, the main catalysts are practical rather than abstract: confirmed match start time, any schedule shifts, and whether the contest is actually completed inside the market’s settlement window. The market description matters because if the match is not played at all, ends without a winner, or is pushed beyond seven days without a result, the contract goes to 50-50; if play begins but stops before completion, the same fallback applies under the market’s rules.[7] Live draw updates, official tournament scheduling, and any withdrawal or retirement news are therefore the key items to watch, because they can move the contract from a clean two-way outcome into a settlement tied to the event mechanics rather than the tennis result.[4][7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: National Bank Open: Alina Korneeva vs Coco Gauff 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 Polymarket Qué Es, which mirrors the Polymarket order book at 0% fees.

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 Qué Es. 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 Polymarket Qué Es 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.