Canadian Open: Kamil Majchrzak vs Gael Monfils

Platform comparison

Market context

Kamil Majchrzak is scheduled to face Gael Monfils at the Canadian Open, and a **YES** share in this market pays out if Majchrzak advances, while a **NO** share pays out if Monfils advances. The current crowd-implied probability of 78% for Majchrzak points to a market view that he is the more likely winner, broadly in line with other pre-match tennis pricing that has also favoured Majchrzak. [1][10][15]

For a new reader, prediction markets convert a match outcome into a simple yes/no contract, but the settlement rules matter as much as the tennis. Here, if the match is not played, finishes level in a way the market treats as unresolved, or is delayed more than seven days beyond the scheduled date without a winner, the contract settles 50-50 rather than to either player. In practical terms, that means a trader is not only betting on who wins, but also on whether the match is completed within the window. [1]

The main catalysts to watch are tournament scheduling, any official change to the order of play, and the usual ATP factors that can disrupt a first-round match, such as weather, withdrawals, or a walkover. If the fixture is moved, suspended, or removed from the schedule, that affects whether the market resolves to Majchrzak, Monfils, or the fallback 50-50 outcome. Live bookmaker and model pricing has already shifted towards Majchrzak, with several outlets listing him as the favourite before play. [3][4][6][8][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Canadian Open: Kamil Majchrzak vs Gael Monfils across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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.

Do I need to KYC for this market?

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

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.