National Bank Open: Adam Walton vs Jenson Brooksby

Platform comparison

Market context

Adam Walton and Jenson Brooksby are due to meet at the National Bank Open, but the contract is currently priced at **0% YES**, which is materially below any realistic pre-match tennis pricing and suggests the market is either stale, mis-synchronised with the draw, or waiting on an official scheduling update rather than reflecting a live sporting view. Walton’s profile is that of a solid hard-court baseliner with most of his success below ATP main-tour level: he has nine Challenger titles, all on hard courts, and his ATP-level hard-court record remains modest at 12-25 overall[2][8]. Current stat pages also show a mixed 2026 return, with Walton listed around 3-7 on ESPN and 30-20 on TennisStats, underlining how different data feeds can lag or define levels differently[1][3].

For traders, the key issue is not just form but whether the match is actually played as scheduled, because the market rules allow a 50-50 settlement if the fixture is cancelled, tied, or delayed beyond seven days without a winner. That makes the main catalysts official order-of-play updates, retirement or walkover news, and any bracket changes from the National Bank Open itself; ATP and tournament listings are the most relevant checks for confirmation, while prediction-market pricing may diverge sharply until the event is locked in[10][17]. If an analyst consensus emerges closer to a standard ATP-level coinflip, the current 0% implied probability would stand out as an extreme outlier rather than a credible match assessment.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.