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US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo

"US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo" on Polymarket, Kalshi and Is Kalshi Legal in California — what traders need to know about platform choice, KYC and tax law.

US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 1 O/U 8.5 63% US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Total Sets: O/U 3.5 63% US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Match O/U 36.5 53% US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 1 O/U 9.5 52% Volume: $133K Liquidity: $396K Closes: 9 Sept 2026
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US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Is Kalshi Legal in California) Pick
polygram.ink (preferred broker)
63% 37% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Go to the live market →
Polymarket (direct)
polymarket.com
63% 37% 0% Geo-blocked in US/UK/EU USDC, on-chain Go to the live market →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD Go to the live market →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR Go to the live market →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) Go to the live market →

Outcome probabilities

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

OutcomeProbability
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 1 O/U 8.563%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Total Sets: O/U 3.563%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Match O/U 36.553%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 1 O/U 9.552%
Completed Match50%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 2 O/U 8.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 2 O/U 9.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 2 O/U 10.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 4 Winner50%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 3 O/U 8.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 3 O/U 9.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 3 O/U 10.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 4 O/U 8.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 4 O/U 9.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 4 O/U 10.550%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Game Spread +/-3.549%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Match O/U 38.547%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set Handicap +/-1.545%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 1 Winner44%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 3 Winner44%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 2 Winner43%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo41%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Match O/U 40.540%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set 1 O/U 10.528%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Total Sets: O/U 4.527%
US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo Set Handicap +/-2.527%

Market context

Based on real-money crowd forecasting, us open atp: jan-lennard struff vs francisco cerundolo stands at 63% likelihood according to current market consensus. This market refers to the tennis match between Jan-Lennard Struff and Francisco Cerundolo in the US Open ATP, originally scheduled for September 2, 2026 at 11:00AM ET. This market…

Methodology

This overview of US Open ATP: Jan-Lennard Struff vs Francisco Cerundolo 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

Is Polymarket legal in my country?
Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Is Kalshi Legal in California has a different geo footprint.
Can I trade anonymously?
Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California 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 Legal in California 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.
What if regulation changes?
If regulation changes in your jurisdiction (e.g. prediction markets are banned), Is Kalshi Legal in California would geo-block the affected region and continue processing withdrawals. Your funds remain withdrawable at any time.
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Related Topics

Tennis Prediction Markets