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Libema Open: Tallon Griekspoor vs Botic van de Zandschulp

Five-platform snapshot of "Libema Open: Tallon Griekspoor vs Botic van de Zandschulp" — live Polymarket pricing, plus how Kalshi, Betfair and Manifold structure the same contract.

80% YES 20% NO Volume: $236K Liquidity: $87K Closes: 15 Jun 2026
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Libema Open: Tallon Griekspoor vs Botic van de Zandschulp

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Prediction Today Pick
polygram.ink
80% 20% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Open on Prediction Today →
Polymarket
polymarket.com
80% 20% 0% Geo-blocked in US/UK/EU USDC, on-chain Open on Prediction Today →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD Open on Prediction Today →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR Open on Prediction Today →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) Open on Prediction Today →

Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Prediction Today.

Active sub-markets

Market context

Griekspoor and Van de Zandschulp are set to meet in the opening round of the Libema Open grass-court tournament in 's-Hertogenbosch, Netherlands, in early June 2026. The 80% crowd probability backing Griekspoor reflects his superior ranking and recent form on grass surfaces, where he has demonstrated consistency over the past two seasons. Both players are Dutch, eliminating travel fatigue as a differentiator, though Griekspoor has posted stronger results at ATP 250 level events since 2024.

Historical matchups between Dutch players at home tournaments show modest home-court effects; Van de Zandschulp has won three of their last six meetings, suggesting the head-to-head record is closer than the current odds imply. Griekspoor's grass-court record stands at approximately 65% win rate over the past eighteen months, whilst Van de Zandschulp has struggled on faster surfaces, winning just 40% of his grass matches in the same period. The probability gap appears justified by surface-specific performance data rather than ranking alone.

Traders should monitor injury reports through the settlement window, particularly any late withdrawals that would trigger the 50-50 tie resolution. The match scheduling—originally listed for 4:00 AM ET—may shift depending on tournament draw adjustments announced closer to the event. Weather conditions at 's-Hertogenbosch in early June typically favour faster play, which historically advantages Griekspoor's serve-dominant game. Any official postponement beyond 7 June would activate the delayed-match clause.

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 Prediction Today, which mirrors the Polymarket order book directly.

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

Is this market available outside the US?
Prediction Today 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 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.
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.
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