Bonn: Jan Choinski vs Jamie Mackenzie

Platform comparison

Market context

Polymarket’s contract is effectively pricing **Jan Choinski very close to certainty** today, with the crowd implying **100% YES** on his advancement against Jamie Mackenzie. That lines up with the live event context: the match is the Bonn Challenger final on red clay at Centre Court, scheduled for 11:00 UTC, and both player listings place Choinski far higher in the ATP rankings than Mackenzie.[1][8][18]

The market is also being read through the normal settlement rules on-chain: USDC collateral is locked in Polygon-based conditional tokens, so the outcome depends on the match’s official completion, not the shape of the scoreline alone. If the match is played and a winner is recorded, the winning side resolves accordingly; if it is not played, ends level, or drifts more than seven days past the scheduled date without a result, it resolves 50-50. That matters here because the contract is about *advancement*, so retirement, walkover, or abandonment scenarios can matter as much as straight-set form.[12][13]

The main catalysts for traders are straightforward: any official start-time change, weather or scheduling interruption in Bonn, or a late withdrawal from either player. Comparable market data and live score feeds have already treated Choinski as the stronger side, with external pricing showing him a heavy favourite, while recent live listings also point to no prior head-to-head record between the pair, which leaves current pricing driven more by ranking gap and tournament form than by matchup history.[1][10][18]

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.

FAQ

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 PolyGram. 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.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.