Canadian Open: Sebastian Baez vs Mattia Bellucci

Platform comparison

Market context

Sebastian Báez’s match with Mattia Bellucci in Montreal is the underlying event here, and the market’s 100% YES reading implies it is still pricing a straight advancement outcome rather than a cancellation or settlement wrinkle. In practical terms, that is a very one-sided view for a tennis contract that normally resolves on who actually advances, with any non-played or unresolved scenario reverting to a 50-50 style settlement under the stated rules.

Comparable pre-match pricing was not unanimous on the tennis side. FanDuel listed the fixture with market odds, while Betstamp showed the pair near coin-flip territory, with Bellucci at 48% and Báez at 52%; Dimers was similar at roughly 52% Bellucci to 48% Báez, and Kalshi’s own market snapshot had Báez at 53% and Bellucci at 43% for the same matchup. That spread shows why an on-chain market at 100% needs careful read-through: it may reflect late information, thin liquidity, or a stale quote that no longer matches the live tennis consensus.[1][3][8][11]

For traders, the key catalysts are whether the match is actually completed before the 7-day delay threshold, and whether any official schedule change, withdrawal, or postponement alters the settlement path. Because the market settles in USDC, position value can reprice sharply if the tennis event is delayed, abandoned, or pushed beyond the window; broader crypto conditions can matter at the margin through collateral preference and intraday risk appetite, but the direct driver remains match status. Flashscore and SofaScore are the quickest live references for whether play has started or advanced, while bookmaker screens can show whether the price gap is broadening or narrowing into the draw.[2][4][10]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Canadian Open: Sebastian Baez vs Mattia Bellucci on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

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.

FAQ

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.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.