Kosice: Guido Justo vs Lilian Marmousez

Platform comparison

Active sub-markets

Market context

A tennis match between Guido Justo and Lilian Marmousez is scheduled for 25 May 2026 in Košice, Slovakia, with the winner advancing in the tournament bracket. The current market probability of 0% for Justo suggests either strong confidence in Marmousez or minimal trading activity on this particular fixture. Settlement occurs by 1 June 2026, allowing a six-day window for the match to conclude and a result to be confirmed.

Justo, an Argentine player, and Marmousez, a French competitor, occupy similar rankings within the lower-to-mid tier of professional tennis. Historical precedent for matches between players of comparable ranking shows outcomes typically reflect recent form, surface preference, and head-to-head records rather than static seeding. The 0% probability assigned to Justo likely reflects either incomplete market information or a decisive head-to-head advantage favouring Marmousez, though such extreme probabilities in tennis often shift once trading volume increases closer to match day.

Traders should monitor ATP or WTA tour announcements regarding surface conditions at the Košice venue, as clay, hard court, or grass significantly influences matchup dynamics. Recent injury reports or withdrawal patterns from either player warrant attention, particularly given the settlement window's sensitivity to cancellations or delays beyond seven days. Court scheduling changes, weather forecasts for late May, and any late-round exits by either player in preceding tournaments will provide concrete catalysts for probability reassessment in the final weeks before play.

Methodology

This page tracks Kosice: Guido Justo vs Lilian Marmousez across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. PolyGram routes every trade through to Polymarket — at 0% fees.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.