Pronóstico: National Bank Open, Qualification: Maya Joint vs Ana Grubor

Platform comparison

Market context

Polymarket is pricing this contract at **100% YES**, which on a USDC-settled, Polygon-based market means traders are effectively assuming Maya Joint will advance from the qualifying match against Ana Grubor. The contract is driven by the tennis result itself, not by ranking narratives, and it will only resolve to 50-50 if the match is not played, ends level, or runs past the seven-day backstop without a winner determined.[4]

That price is consistent with the wider event context. Live score and betting pages show Joint and Grubor in a scheduled qualifying match on 1 August 2026, while third-party odds feeds have Joint as a very heavy favourite, with implied probabilities around the low-to-mid 90s and some markets showing match prices near 1.01 for Joint.[1][3][5][12] For a Polymarket user, the key point is that an extreme YES price usually reflects both expected strength and the market’s confidence that the fixture will be completed normally, rather than a precise read on set-by-set volatility.[4][7]

The main catalysts are operational rather than strategic: official order-of-play updates, any change to court assignment or start time, and whether the match is completed without interruption. If play is delayed, suspended, or stopped by retirement or walkover, the contract’s specific resolution rules matter more than the scoreline at the point of interruption.[4] With the settlement window extending to 8 August 2026, traders should watch the tournament feed and live scoring for confirmation that the fixture was actually played through to a recognised winner.[1][14][15]

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

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

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.

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.

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.