Libema Open: Lois Boisson vs Solana Sierra

Platform comparison

Active sub-markets

Market context

Lois Boisson faces Solana Sierra in the opening rounds of the Libema Open grass-court tournament, scheduled for 8 June 2026. The 31% implied probability for Boisson reflects a significant underdog position, though the match remains three weeks out and subject to draw confirmation and player fitness updates typical of the pre-tournament period.

Boisson, a French player competing primarily on the ITF and lower WTA circuits, has limited direct head-to-head history against Sierra that would anchor historical precedent. Comparable matchups between players at similar ranking tiers on grass courts show considerable volatility; surface specialisation and recent form often override seeding or career records. The early probability weighting suggests the market has factored Sierra as the favoured player, though without recent tournament results or injury reports in the public domain, the confidence level remains modest.

Traders should monitor official tournament draws once released, typically 5–7 days before play begins, as late withdrawals or substitutions can shift match-ups entirely. Injury announcements from either player's camp, particularly on grass where movement demands are acute, would be immediate catalysts. Weather conditions at the Libema Open venue in the Netherlands can affect grass-court play and scheduling; any delays beyond the seven-day window from 8 June would trigger the 50-50 resolution clause. Recent form in qualifying rounds or warm-up events in late May would provide the most current form indicator available to markets before settlement.

Methodology

We track Libema Open: Lois Boisson vs Solana Sierra 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

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

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 Today?

Zero. Prediction Today 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.

Do I need to KYC for this market?

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