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National Bank Open: Adam Walton vs Jenson Brooksby

"National Bank Open: Adam Walton vs Jenson Brooksby" — odds, fees, regulatory status. Is Kalshi Legit as a Polymarket alternative.

Completed Match 100% National Bank Open: Adam Walton vs Jenson Brooksby Set 1 O/U 8.5 100% National Bank Open: Adam Walton vs Jenson Brooksby Set 2 O/U 8.5 100% National Bank Open: Adam Walton vs Jenson Brooksby Set 2 O/U 9.5 100% Volume: $167K Closes: 10 Aug 2026
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National Bank Open: Adam Walton vs Jenson Brooksby

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Is Kalshi Legit) Pick
polygram.ink (preferred broker)
100% 0% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle See live odds →
Polymarket (direct)
polymarket.com
100% 0% 0% Geo-blocked in US/UK/EU USDC, on-chain See live odds →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD See live odds →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR See live odds →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) See live odds →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
Completed Match100%
National Bank Open: Adam Walton vs Jenson Brooksby Set 1 O/U 8.5100%
National Bank Open: Adam Walton vs Jenson Brooksby Set 2 O/U 8.5100%
National Bank Open: Adam Walton vs Jenson Brooksby Set 2 O/U 9.5100%
National Bank Open: Adam Walton vs Jenson Brooksby Set Handicap +/-1.5100%
National Bank Open: Adam Walton vs Jenson Brooksby0%
National Bank Open: Adam Walton vs Jenson Brooksby Set 1 Winner0%
National Bank Open: Adam Walton vs Jenson Brooksby Total Sets: O/U 2.50%
National Bank Open: Adam Walton vs Jenson Brooksby Set 2 Winner0%
National Bank Open: Adam Walton vs Jenson Brooksby Match O/U 21.50%
National Bank Open: Adam Walton vs Jenson Brooksby Set Handicap +/-1.50%
National Bank Open: Adam Walton vs Jenson Brooksby Set 1 O/U 9.50%
National Bank Open: Adam Walton vs Jenson Brooksby Match O/U 22.50%
National Bank Open: Adam Walton vs Jenson Brooksby Set 1 O/U 10.50%
National Bank Open: Adam Walton vs Jenson Brooksby Set 2 O/U 10.50%
National Bank Open: Adam Walton vs Jenson Brooksby Match O/U 23.50%

Market context

Adam Walton and Jenson Brooksby were listed for a National Bank Open first-round match originally scheduled for 3 August 2026, with order-of-play listings showing the contest still tied to the early-round ATP programme in Montreal/Toronto and one source later marking it as upcoming on 4 August[2][5][6]. For a market printing 0% YES, the practical read is that the contract is already heavily discounting the chance of a completed on-court result before the settlement window closes on 10 August, rather than pricing a routine match outcome[2].

Comparable tennis cases at this tournament matter because first-round slots can move, suspend, or remain unplayed if the schedule is disrupted by weather, court backlog, or withdrawals. The event runs through 13 August, so a delay beyond seven days from the scheduled date would push the contract towards its 50-50 fallback rather than a normal winner settlement[1][11][15]. In regulatory terms, German GlüStV treatment is the main accessibility constraint for users in Germany: even if a market is visible, local gambling rules can limit or block participation depending on operator licensing and the product’s classification. In the US, the CFTC’s stated view that it has exclusive jurisdiction over event contracts keeps prediction markets within a federal derivatives framework rather than ordinary sportsbook regulation[9].

The main catalysts are basic but time-sensitive: confirmation that the match is actually staged, any revised order of play, and any retirement, walkover, or cancellation notice before the seven-day cutoff. For accessibility, “no-KYC up to $1,500” means a user can usually trade smaller amounts without full identity verification, which lowers onboarding friction but still leaves a cap on unverified activity and does not remove jurisdictional restrictions[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of National Bank Open: Adam Walton vs Jenson Brooksby reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.

Resolution & payout

On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.

FAQ

Do I need to KYC for Is Kalshi Legit?
Not for lifetime trading volume under $1,500. Above that threshold, a quick KYC flow kicks in — ID, selfie, approximately 5-10 minutes. The threshold matches FATF travel standards for unregulated crypto platforms.
How are winnings taxed?
Tax treatment varies by jurisdiction. In most countries, prediction market gains are treated as ordinary income or capital gains. We cannot provide tax advice — consult a tax professional for your specific situation.
Can I trade anonymously?
Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legit stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.
What happens during a tax audit?
You're responsible for documenting your trades. Is Kalshi Legit exports a full transaction history (CSV/PDF) for tax reporting. In an audit you'll need to present these documents.
Are prediction markets gambling?
Legally unclear in most jurisdictions. Some interpretations classify them as wagering (gambling regulation applies), others as derivatives (financial regulation applies). There's no global precedent specifically for on-chain prediction markets.
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Related Topics

Tennis Prediction Markets