National Bank Open: Gabriel Diallo vs Kyrian Jacquet

Platform comparison

Market context

Polymarket is pricing **Gabriel Diallo** at 100% on this contract, so the market is effectively saying the USDC-settled conditional token has already fully migrated to one outcome. For a user holding the yes side, that implies the current on-chain mark leaves almost no room for an alternative resolution unless the match is voided or treated as a tie/delay under the market rules.

That reading is not out of line with the wider market. Several tennis books and model-based previews also lean to Diallo, with prices around the low- to mid-1.5s and implied win rates broadly in the 54% to 65% range, while some sharper boards have been closer to a near coin flip[1][2][5][14]. In other words, Polymarket’s 100% looks far more extreme than the underlying pre-match consensus, so the relevant question is not tennis quality in the abstract, but whether the contract has been mispriced, already resolved internally by market flow, or is vulnerable to an administrative outcome.

For traders, the key catalysts are procedural rather than tactical: whether the round-1 match is actually completed, whether it is moved within the settlement window, and whether any official abandonment, retirement, or no-contest ruling triggers the market’s 50-50 fallback. The Athletic’s schedule listing had the pairing on the National Bank Open slate, while sportsbook and live-score feeds showed the match as scheduled and in progress around 2 August, which matters because a delayed start or unfinished contest can change how the token settles[2][6][7][8]. On Polymarket, the practical watchpoints are the status of the ATP result feed, the tournament order of play, and whether the on-chain conditional tokens can only resolve once the official winner is confirmed.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Gabriel Diallo vs Kyrian Jacquet 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.