Roehampton: Michael Geerts vs Lucas Poullain

Platform comparison

Market context

Michael Geerts and Lucas Poullain are scheduled to meet at Roehampton on 20 August 2026. The Polymarket contract currently prices Geerts' advancement at 26 cents per share, implying roughly a one-in-four chance he progresses past Poullain. The settlement window closes on 27 August, allowing a seven-day buffer for delays or postponements before the market resolves to 50-50.

Geerts, a Belgian player ranked in the ATP's lower reaches, has competed primarily on the Challenger circuit with occasional main-draw appearances. Poullain, a French left-hander, operates similarly within the lower professional tiers. Historical matchups between players of comparable ranking and surface experience—particularly on grass at Roehampton, where serve-and-volley patterns and court conditions favour certain styles—typically see the higher-ranked player favoured by 65–75 per cent probability. The current 26 per cent valuation for Geerts suggests market participants view Poullain as the clear favourite, though the exact ATP rankings at match time will refine that assessment.

Traders should monitor ATP rankings updates and any injury announcements in the fortnight before 20 August, as movement in either player's seeding or fitness status could shift the implied probability materially. Roehampton's grass-court conditions and the match's early scheduling (6:00 AM ET) may also influence play style and fatigue factors. Recent tournament results for both players—particularly performances on grass or hard courts in July and early August—will provide concrete form data. Any withdrawal or cancellation triggers the 50-50 resolution clause, making fixture confirmation essential tracking.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Scam?, which mirrors the Polymarket order book directly.

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

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.

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%.