Cincinnati Open: Hamad Medjedovic vs Marco Trungelliti

Platform comparison

Market context

Polymarket has this contract at 0% YES today, despite the match having been scheduled for 14 August and listed in the Cincinnati draw, which suggests the market is treating the outcome as effectively closed or not actionable rather than pricing live match uncertainty. On Polymarket, the position settles through USDC on Polygon and resolves via conditional tokens, so what matters is whether Medjedovic advances, Trungelliti advances, or the match is ultimately voided under the market rules.

That zero price is best read against the underlying tennis context rather than as a forecast of form alone. Recent pre-match listings had Medjedovic as the clearer market favourite, with outside projections placing him around two-thirds to three-fifths to win, while Trungelliti came in as the qualifier and the lower-ranked player. The head-to-head is thin and split, which leaves room for volatility, but the gap in baseline expectation explains why a fast-moving market can push one side to a near-zero implied chance once the result is effectively settled or the contract is no longer trading normally.

For traders, the main catalysts are practical rather than speculative: official order-of-play updates, any late withdrawal or retirement note, and whether the ATP/Cincinnati draw records the match as completed, abandoned, postponed beyond the seven-day window, or voided. The settlement window runs to 21 August 2026 at 19:30 UTC, so the key check is whether the event is completed and a winner is recorded before then, because a non-played or unresolved match is meant to resolve 50-50 under the stated rules.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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%.