Bunschoten: Guy Den Ouden vs Tom Gentzsch

Platform comparison

Market context

A tennis match between Guy Den Ouden and Tom Gentzsch at the Bunschoten tournament, originally set for 19 July 2026, is the real-world event this market tracks. In prediction markets, a YES share pays out if the market’s stated condition is met—here, that Den Ouden advances—while a NO share pays if he does not. The current crowd-implied probability sits at 100% YES, suggesting traders overwhelmingly expect Den Ouden to win, though the market still resolves to a 50-50 split if the match is cancelled, tied, or delayed beyond seven days without a winner [1].

Historically, markets showing 100% probability on a single outcome in tennis often reflect either a dominant player facing a clear underdog or a match where the opponent has withdrawn before play. In such cases, the price rarely moves unless new information emerges, such as a late injury or scheduling change. Comparable cases from ATP events show that when one player is virtually certain to advance, liquidity thins and the market becomes less sensitive to minor fluctuations, locking in the consensus until a catalyst disrupts it.

Traders should monitor official tournament schedules and player announcements for any updates on match status, especially given the seven-day delay clause. A recent ATP notice confirmed that matches postponed due to weather must be resumed within seven days to avoid automatic resolution to 50-50, a rule that applies here [1]. Key catalysts include Den Ouden’s fitness reports, Gentzsch’s travel confirmations, and any official cancellations from the Bunschoten organisers, as these could shift the probability from its current certainty.

Sources: 1

Methodology

This page reviews Bunschoten: Guy Den Ouden vs Tom Gentzsch across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Market UK, which mirrors the Polymarket order book at 0% fees.

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

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.