Roehampton: Oliver Tarvet vs Charles Broom

Platform comparison

Market context

Oliver Tarvet faces Charles Broom at Roehampton in late August 2026, with the market currently pricing Tarvet at 86% to advance. The match sits just over a week out from settlement, leaving minimal window for schedule disruption—the key resolution risk given the seven-day delay clause that would trigger a 50-50 split.

Tarvet's dominance in the implied probability reflects his ranking advantage and recent form relative to Broom. At ATP level, players seeded or ranked significantly higher than their opponents typically win 80–88% of matches on grass courts, where Roehampton's surface sits. Broom would need either a sharp recent improvement in his game or Tarvet to arrive with injury concerns to shift this substantially. Historical precedent suggests the 86% mark is calibrated appropriately for a clear favourite on a surface that rewards consistency and serve strength.

The critical watch points are injury announcements from either camp and any weather warnings for the Roehampton region in the days immediately before August 20. Grass-court tournaments occasionally reschedule matches due to rain, though Roehampton's scheduling flexibility typically absorbs single-day delays. Monitor both players' social media and ATP official channels for withdrawal notices or fitness updates; a late withdrawal by Tarvet would flip the market sharply, whilst minor injury management by either player rarely moves markets of this magnitude. The settlement window closes August 27 at 10:00 UTC, giving traders roughly one week to monitor developments before resolution.

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 Prediction Today, 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

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.

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%.