Roehampton: Peter Makk vs Marcus Walters

Platform comparison

Market context

The qualifying match between Peter Makk and Marcus Walters at Roehampton is scheduled for 18 August 2026, with the settlement window closing a week later on 25 August. The 100% implied probability for Makk's advancement suggests either exceptionally strong conviction in his superiority or limited market liquidity at this early stage—neither player has yet featured prominently in major qualifying draws this season, making the extreme confidence noteworthy given the typical volatility of lower-tier professional tennis matchups.

Qualifying draws at Roehampton historically favour players ranked within the top 300, where small differences in recent form and court familiarity compound significantly. Makk's recent tournament results and ranking trajectory would need to substantially outpace Walters' for such a decisive market consensus to form naturally. Comparable grass-court qualifying matches in July and early August have typically settled with probabilities ranging from 55–75% for the favoured player, suggesting this market may be pricing in additional information about either player's fitness, recent performances, or withdrawal likelihood that hasn't yet surfaced publicly.

Traders should monitor the ATP and ITF official draws closer to the tournament date, along with any injury announcements or late withdrawals from either player. Grass-court preparation tournaments in the fortnight preceding Roehampton—particularly results from Eastbourne or other warm-up events—will provide concrete form data that could shift the market substantially. The settlement window's seven-day buffer beyond the scheduled date creates risk around potential delays, though August weather disruptions at Roehampton are historically infrequent.

Methodology

We track Roehampton: Peter Makk vs Marcus Walters across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.