Roehampton: Peter Makk vs Marcus Walters

Platform comparison

Market context

Peter Makk and Marcus Walters are scheduled to compete in the Roehampton qualifying draw on 18 August 2026. The match represents an early-round encounter at a grass-court event in south-west London, with advancement dependent on winning a single best-of-three sets contest. The settlement window extends to 25 August, allowing a seven-day buffer for rescheduling or completion delays before the market resolves to a 50-50 split.

The 100% implied probability for Makk warrants scrutiny against comparable qualifying-round matchups at Roehampton and similar ATP 250 events. Qualifying draws typically feature ranked players alongside unranked or lower-ranked competitors, creating asymmetric probability distributions. Historical data from grass-court qualifying rounds shows that seeding and ranking disparities often drive extreme probabilities; however, single-match resolution creates binary outcomes regardless of pre-match favouritism. Traders should cross-reference both players' recent grass-court form, head-to-head records if available, and their current ATP rankings to validate whether the extreme probability reflects genuine competitive imbalance or market inefficiency.

Key catalysts include official draw confirmation, injury announcements, and weather disruptions affecting the Roehampton schedule. Programmatic monitoring should flag any withdrawal notices or schedule changes posted to the ATP Tour website or Roehampton's official channels. Given the qualifying-round context, late withdrawals are more common than in main-draw matches, particularly if either player gains entry to a higher-ranked event. Conditional order logic should account for the seven-day delay threshold; markets resolving to 50-50 due to postponement beyond that window represent distinct outcomes from match results.

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

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.

UK Frequently Asked Questions

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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%.