National Bank Open: Valentin Vacherot vs Mariano Navone

Platform comparison

Market context

The match is a straight contest between **Valentin Vacherot** and **Mariano Navone** at the National Bank Open, and a YES share pays out if Vacherot advances; a NO share pays out if Navone advances. If the match is not completed in normal circumstances, the market can still settle 50-50 under the stated cancellation, tie, or long-delay rules, so traders are watching both the draw and the actual court schedule.

The current 60% YES price implies Vacherot is the market favourite, which is broadly consistent with the only recorded head-to-head: Vacherot beat Navone 6-3, 6-4 on hard court in Miami in March 2026, leaving the series 1-0 to Vacherot.[1][12][15] That earlier result matters because this event is also on hard court, and Vacherot has been priced as the stronger player by several tennis preview and rating sites, although Navone’s clay-court profile is generally better than his hard-court record.[4][5][17]

For traders, the key catalysts are late tournament scheduling changes, any withdrawal or walkover news, and whether the match is moved inside the seven-day settlement window. The market description says the original slot was 6 August at 10:00AM ET, but the live event listing is the real trigger for settlement, so any postponement, court change, or retirement update can matter more than pre-match ranking narratives.[2][13] Recent match-preview pages also show that this pairing has already been tracked as an active National Bank Open fixture, which makes confirmed draw status and official start time the main things to monitor rather than broader tour form.[7][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Valentin Vacherot vs Mariano Navone 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 Prediction Market 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.

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.