National Bank Open: Karen Khachanov vs Terence Atmane

Platform comparison

Market context

Karen Khachanov’s second-round meeting with Terence Atmane at the National Bank Open is a straight winner-takes-the-round spot on hard courts, with the market currently pricing Khachanov at 56% after both players reached this stage in Montreal. The pairing is an open one: there is no recorded head-to-head since 2022, and several live match pages list the matchup as upcoming rather than settled, which fits a market that is still being priced primarily off current form and schedule context.[2][3][12]

The historical frame leans modestly towards Khachanov because he has repeatedly gone deep at this event, including three semi-finals or better in Canada and a run to the final in Montreal in 2025, yet he has still not won the title there.[1][14] Atmane brings a sharper recent upset profile, having beaten Jack Draper in three sets to reach Khachanov, and he has already shown he can beat top-25 players on North American hard courts.[1][7] The crowd’s 56% read looks consistent with a slight Khachanov edge rather than a dominant favourite, especially given the narrower ATP ranking gap now reported between them.[1]

For traders, the main catalysts are schedule integrity and freshness rather than structure. Atmane played the day before against Draper, while Khachanov reportedly had six days’ rest since his last match, so any delay or rescheduling could matter if it shifts the balance of recovery.[1] The contract also has a clear non-completion fallback: if the match is not played, ends level, or is delayed more than seven days without a winner, it resolves 50-50, so updates from the National Bank Open draw and order-of-play matter directly for settlement risk.[3][4] In macro terms, there is no obvious BTC or ETH linkage from the tennis fixture itself, so any crypto-angle here is mainly the USDC settlement rail and the usual broader-market liquidity backdrop rather than a match-specific coin flow.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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%.