Stuttgart Open: Jan-Lennard Struff vs Alexander Bublik

Platform comparison

Active sub-markets

Market context

The Stuttgart Open, held annually on grass courts in Baden-Württemberg, will host a first-round encounter between German qualifier Jan-Lennard Struff and Kazakhstani player Alexander Bublik in June 2026. Struff, ranked outside the top 100 for much of his career, has occasionally qualified for ATP events; Bublik, a volatile left-hander with a career-high ranking in the 40s, brings unpredictability to grass-court play. The match is scheduled for 4:00 AM ET on 10 June, reflecting the European morning slot typical of Stuttgart's opening rounds. The 0% crowd probability suggests either extreme uncertainty about match completion or minimal trading activity at this early stage of market formation.

Historical resolution patterns for grass-court qualifiers show weather cancellations occur in roughly 8–12% of Stuttgart matches annually, particularly in early June when rain is common in southwestern Germany. Bublik's injury record—including recurrent shoulder issues—has forced withdrawals from tournaments; Struff has shown greater durability but remains prone to first-round exits. The settlement window extends to 17 June, allowing a seven-day buffer for rescheduling before the 50-50 tie resolution triggers.

Traders should monitor ATP injury bulletins and Stuttgart's official draw confirmation, typically released 48 hours before play. German gambling regulation (GlüStV) permits prediction markets on sports outcomes without specific tennis carve-outs; US CFTC oversight remains limited for non-financial derivatives. Markets under €1,500 notional value generally operate without KYC requirements across EU-regulated platforms, though this Stuttgart match—if traded at scale—may exceed that threshold, triggering identity verification for larger positions.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Legal UK, which mirrors the Polymarket order book directly.

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

Where can I trade this market with the lowest fees?

On Polymarket Legal UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Legal UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on Polymarket Legal UK?

Zero. Polymarket Legal UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.