Geneva Open: Casper Ruud vs Mariano Navone

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Active sub-markets

Market context

Mariano Navone has already beaten Casper Ruud in Geneva, turning what had been a straightforward Ruud favourite into a live upset result rather than a pre-match forecast. That matters for settlement: the market now hinges on the tournament’s official outcome rather than the pre-event pricing, and the crowd’s 0% YES implies traders have either missed the result or are pricing in the likelihood that the market resolves against Ruud.

Before the semi-final, outside models had Ruud as a clear favourite. Dimers put him at an 81% win probability and Last Word on Sports tipped Ruud in two sets, which is the kind of pre-match framing usually seen when a top clay-courter meets a lower-ranked opponent on a surface that suits his game. The immediate comparable case is the match itself: despite Ruud’s stronger baseline profile and clay pedigree, Navone was able to convert the spot when it counted.

The key catalysts now are administrative rather than sporting. Traders should watch the ATP’s official result page and any market rule updates if there is a correction, retirement note, or scoring dispute, since a completed match normally settles on the player who advanced, while an unresolved abandonment can trigger the 50-50 fallback depending on timing. The settlement window runs to 29 May, so only a formal determination from the event, not further speculation, should move this market now.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Geneva Open: Casper Ruud vs Mariano Navone 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, 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?

PolyGram 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.

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.

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.