Roehampton: Peter Makk vs Marcus Walters

Platform comparison

Market context

Peter Makk and Marcus Walters are scheduled to compete in the Roehampton qualifying tournament on 18 August 2026. The match determines advancement in a grass-court event held in Great Britain, with the settlement window closing on 25 August. The 100% implied probability reflects either exceptionally high confidence in one player's superiority, limited liquidity in the market, or both conditions simultaneously. For algorithmic traders, this extreme pricing warrants scrutiny: qualifying matches at smaller events often feature incomplete historical data, making conventional rating systems unreliable inputs for conditional orders.

The Roehampton qualifying draw typically features players ranked outside the main draw threshold, often British domestic competitors or lower-ranked touring professionals. Historical precedent suggests qualifying matches at grass-court events carry higher upset potential than clay or hard courts, partly due to surface-specific preparation variance. Traders building automated strategies should flag that qualifying matches have elevated withdrawal and walkover rates compared to main-draw fixtures—the seven-day delay clause becomes operationally significant if either player sustains injury during the lead-in period.

Monitoring the ATP and WTA entry lists through late July will confirm both players' participation status and recent form. Grass-court results from preceding weeks (Wimbledon qualifying, other UK events) provide the most relevant comparable data. The settlement window's 7 August buffer before match day allows traders to adjust positions based on late withdrawals or schedule changes, though the current 100% pricing leaves minimal margin for such adjustments. Conditional order logic should account for the 50-50 tie-break clause if either player's fitness status becomes uncertain within 48 hours of play.

Methodology

This page reviews Roehampton: Peter Makk vs Marcus Walters 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 Kalshi Fees, which mirrors the Polymarket order book at 0% fees.

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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.