National Bank Open: Jacob Fearnley vs Adrian Mannarino

Platform comparison

Market context

Jacob Fearnley’s first-round meeting with Adrian Mannarino at the National Bank Open has been priced very differently across venues, with the prediction market showing **100% YES** for Fearnley while tennis preview sites are notably less extreme. Tennis.com’s projected winner model gives Fearnley a **61%** chance, while TennisTemple has the pair at **50-50** in its match page, and sportsbook-style price guides cluster around Fearnley at roughly **1.56-1.58** against Mannarino at **2.42-2.48**, which implies a considerably tighter contest than the crowd line.[3][2][13][15]

The historical frame is straightforward: prediction markets in tennis often move beyond model-based projections when a market is tied to a specific advancement condition, but a **100%** crowd probability is still an outlier unless the match has already been effectively decided by a completed result or a late scratch. On the available pre-match evidence, that level sits well above the analyst consensus and above the implied prices seen on preview and odds pages, so the main interpretive issue is not who is favoured, but whether the market is already reflecting information that the wider tennis feeds have not yet priced in.[3][4][14]

For traders, the key catalysts are late tournament announcements, official order-of-play changes, and any update on whether the match is actually completed before the settlement window closes on 10 August. The match was listed as a Round 1 contest in Montréal, and multiple live-score and tournament pages were still carrying it as a live or upcoming fixture on 4 August, which means any delay, walkover, retirement, or rescheduling could matter as much as pre-match pricing.[1][5][7][10][12]

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 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 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.