Roehampton: Iliyan Radulov vs Johannus Monday

Platform comparison

Market context

The Roehampton grass-court fixture between Iliyan Radulov and Johannus Monday, originally scheduled for 17 August 2026 at 5:00 AM ET, remains on the calendar with no reported changes in the past 48 hours. The 100% implied probability reflects either strong conviction in Radulov's advancement or minimal trading activity on a lower-profile match. Settlement occurs 24 August, allowing a seven-day window before the market resolves to 50-50 if the match remains unplayed or incomplete.

Radulov, a Bulgarian player with limited ATP ranking prominence, faces Monday, a South African competitor with similarly modest career trajectories on the professional circuit. Neither player commands the profile that typically drives substantial prediction market liquidity. Historical precedent suggests grass-court upsets occur at roughly 15–20% frequency in early-round matches between unseeded or lower-ranked players, though specific head-to-head records between these competitors remain sparse in public databases. The extreme probability skew warrants scrutiny—it may indicate insider knowledge of withdrawal, injury, or scheduling confirmation rather than pure form assessment.

Traders should monitor official Roehampton tournament announcements through the ATP and LTA channels for any withdrawal notices or rescheduling. Weather disruptions are material on grass surfaces; August conditions at Roehampton typically favour play, but rain delays could trigger the seven-day extension clause. Confirmation of both players' participation and fitness status in the 48 hours before the scheduled start time represents the primary catalyst that could shift the market materially from its current extreme position.

Methodology

This page reviews Roehampton: Iliyan Radulov vs Johannus Monday 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 Prediction Today, 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.

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'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.

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%.