Canadian Open: Sebastian Baez vs Mattia Bellucci

Platform comparison

Market context

Sebastian Báez and Mattia Bellucci are scheduled to meet in Montréal at the Canadian Open, and the market will resolve on which player advances rather than on any exact scoreline. For a programme or bot that tracks tennis markets, the cleanest input is simply the first completed result state: winner, abandonment, retirement, or postponement beyond the settlement window.

The current 100% crowd-implied probability for Báez is best read as a market that has already decided the favourite is overwhelmingly clear, but comparable cases on hard courts still leave room for execution risk. The pair have no recorded head-to-head meeting, so the pricing is coming from ranking, surface fit and recent form rather than direct matchup history.[1][2][3] Sofascore lists Báez around ATP 53 and Bellucci around ATP 81, while Tennis Temple and Tennis Board both frame it as a first-round hard-court match with Báez the higher-rated player.[3][9][12] That kind of gap usually supports a heavily one-sided price, but it also means any model built for conditional orders should treat the event as binary rather than probability-smooth: the main risk is not a narrow upset narrative, it is whether the match is played to completion at all.

The practical catalysts are scheduling and match-state updates. The match has been listed with multiple start times across feeds, which is a reminder that live trading systems should key off the official in-play start and not a single pre-match timestamp.[3][4][12] The market’s special settlement rule matters: if the fixture is cancelled, never starts, or drifts beyond seven days without a winner, it can settle 50-50 even if one player was heavily favoured. For automated monitoring, that means watching tournament order of play, court assignment, official score providers and any retirement or walkover flags, then updating exposure only once the winner is formally advanced.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Canadian Open: Sebastian Baez vs Mattia Bellucci 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 Polymarket Review UK, 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Review 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.