Prostejov: Vitaliy Sachko vs Vit Kopriva

Platform comparison

Active sub-markets

Market context

Vitaliy Sachko and Vit Kopriva are scheduled to meet at the Prostejov tournament in the Czech Republic on 4 June 2026. The market is currently pricing Sachko at 100% implied probability, suggesting near-certainty of his advancement. This extreme skew typically reflects either a significant seeding or ranking differential, or information asymmetry about player availability and form heading into the event.

Historical precedent for such one-sided pricing in lower-tier ATP or Challenger events often stems from ranking gaps rather than head-to-head record. Sachko, a Ukrainian player, and Kopriva, a Czech domestic competitor, occupy different tiers of professional tennis. When consensus odds reach this extreme, the risk lies not in the favourite's ability but in match cancellation, withdrawal, or unexpected illness—scenarios that would trigger the 50-50 resolution clause. Comparable Challenger tournaments show that administrative delays or player retirements occur in roughly 3–5% of scheduled matches, a floor beneath which pricing rarely falls.

Traders should monitor tournament draw confirmations and any injury bulletins released in the week preceding 4 June. Czech domestic media and ATP Challenger updates will signal whether either player has withdrawn or faces fitness concerns. The settlement window closes 11 June at 08:00 UTC, allowing a seven-day buffer for rescheduling. Given the current 100% pricing, any hint of Kopriva's withdrawal or Sachko's injury would immediately shift the market; conversely, confirmation of both players' participation would likely sustain the consensus.

Methodology

This page reviews Prostejov: Vitaliy Sachko vs Vit Kopriva across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Who Will Win — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

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 Who Will Win?

Zero. Who Will Win 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, Who Will Win 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.