Lexington: Abedallah Shelbayh vs Dusan Lajovic

Platform comparison

Market context

Polymarket is pricing Abedallah Shelbayh vs Dusan Lajovic at **0% YES** on the Shelbayh side, which means the contract is effectively saying Lajovic is the only live outcome unless the match is not played, ends tied, or slips beyond the seven-day resolution window. Because settlement is tied to the on-chain conditional token outcome on Polygon and funded in USDC, the key practical issue for traders is not the headline favourite but whether the event is actually completed under Polymarket’s rules.

That 0% reading sits sharply against traditional tennis pricing, where third-party books and odds compilers have generally had Lajovic around a modest favourite rather than a certainty. TennisExplorer’s compiled odds and model snapshots place the match close to a toss-up, while Tennis Tonic and PokerStars showed Lajovic in front but not at a price consistent with a near-zero Shelbayh probability.[6][4][5] In other words, the market is not simply discounting a weaker player; it is also reflecting how thinly traded contract prices can snap towards one side when order-book liquidity is limited.

The main catalysts are straightforward: whether the Lexington fixture starts on schedule, whether there is any late withdrawal, and whether the match is completed inside the seven-day settlement rule. Polymarket’s own terms say a walkover before the start resolves 50-50, while a match that begins and then ends via retirement, default or disqualification goes to the player who advances.[2] Flashscore still lists the match for 7 August at 10:00, which supports the event being live rather than abandoned, but traders will still watch tournament scheduling and any official order-of-play changes right up to first serve.[1]

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

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.