Bonn: Jan Choinski vs Jamie Mackenzie

Platform comparison

Market context

Polymarket is pricing the contract at **100% YES**, which means the market is effectively treating Jan Choinski’s advance as a foregone conclusion on the current order book. On Polymarket, the position is settled in **USDC** via **Polygon** conditional tokens, so a trader is not buying the real-world result directly but a payoff tied to whether Choinski advances against Jamie Mackenzie before the market’s settlement window closes.

That extreme print is consistent with the wider betting and pricing picture around the match. Independent tennis odds feeds show Choinski as a strong favourite, with bookmaker prices clustered around 1.20–1.23 for Choinski and about 4.0–4.6 for Mackenzie, while Kalshi’s parallel market has also been heavily one-sided towards Choinski.[2][3][5] The only comparable note of caution is that prediction markets can still reprice sharply if a match is postponed, abandoned, or subject to a walkover, because the settlement rule here pays out on advancement, not merely on the scheduled appearance of both players.

For traders, the key catalysts are any official order-of-play update, late injury or withdrawal news, and whether the match starts inside the current settlement timetable, since a cancellation or delay beyond seven days would force a 50-50 outcome rather than a normal win/loss resolution. Flashscore and other live listings currently place the fixture on 2 August, but the exact start time has already appeared inconsistently across feeds, which is worth monitoring because Challenger schedules can shift when preceding matches run long.[1][4][12] A recent live match report has already recorded Choinski as the winner, which is relevant because if that result is finalised and corresponds to the same Bonn fixture, the contract should resolve accordingly once the official outcome is reflected across the market infrastructure.[9]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Bonn: Jan Choinski vs Jamie Mackenzie 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 PolyGram, which mirrors the Polymarket order book at 0% fees.

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.

FAQ

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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.