Stuttgart Open: Giovanni Mpetshi Perricard vs Gauthier Onclin

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Active sub-markets

Market context

The Stuttgart Open grass-court tournament will host a first-round match between French qualifier Giovanni Mpetshi Perricard and Belgian player Gauthier Onclin on 10 June 2026. A prediction market share represents a binary bet: a YES share pays out if Mpetshi Perricard wins and advances; a NO share pays out if Onclin wins instead. The current market probability sits at 100% YES, meaning traders are pricing Mpetshi Perricard as the near-certain favourite, though the settlement window extends to 17 June to account for potential delays or scheduling changes.

Mpetshi Perricard, ranked in the ATP's lower tier, has shown volatility on grass surfaces typical of younger French players transitioning from clay. Onclin, a Belgian journeyman, competes primarily on the Challenger circuit and rarely features in ATP draws. Historical precedent suggests that ATP-ranked players advancing through qualifying typically hold a decisive edge over Challenger-level opponents in main-draw first rounds, though upsets do occur when fatigue or surface unfamiliarity plays a role.

Key variables for traders include official confirmation of both players' health status and any last-minute withdrawals prior to the match. The grass-court season runs narrow scheduling windows; any injury announcement or tournament postponement would trigger the 50-50 tie-break clause if play is delayed beyond seven days. Weather disruptions at Stuttgart's outdoor venue could also compress the tournament schedule, though the settlement window provides a week's buffer for rescheduling.

Methodology

We track Stuttgart Open: Giovanni Mpetshi Perricard vs Gauthier Onclin on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 Prediction Market UK?

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

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Prediction Market UK triggers a quick verification flow that finishes in minutes.

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.