Roehampton: Peter Makk vs Marcus Walters

Platform comparison

Market context

Peter Makk and Marcus Walters are scheduled to compete in the qualifying round of the Roehampton tournament in Great Britain on 18 August 2026. The match represents an early-stage grass-court qualifier with settlement contingent on a completed result by 25 August 2026. The 100% implied probability across prediction markets suggests either overwhelming consensus on one player's superiority or sparse liquidity constraining price discovery.

Qualifying matches at established grass tournaments historically show wide variance in upset frequency, particularly when seeding data and recent form diverge. Roehampton qualifiers have produced notable upsets in prior years, with lower-ranked players occasionally advancing through draws where surface familiarity and momentum outweigh ranking gaps. Without current ATP rankings or recent head-to-head records for Makk and Walters publicly available, the extreme confidence in one outcome warrants scrutiny—such pricing often reflects thin order books rather than genuine certainty. Cross-platform comparison between sportsbooks and prediction markets would typically reveal 15–25% probability gaps in qualifying matches where information asymmetry favours specialist bettors.

Traders should monitor official tournament draws and any late withdrawals, as qualifying schedules frequently shift. Weather delays on grass courts are material; the settlement window's seven-day buffer accommodates rescheduling but creates tail risk if matches compress into back-to-back days. Recent ATP Challenger results for both players, published on the ATP website or Flashscore, would clarify current form and surface preference. Injury reports or late entries into the main draw could alter motivation, particularly if either player secures direct acceptance before the qualifier concludes.

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 PolyGram, 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.