ITF Granby: Erika Sema vs Cadence Brace

Platform comparison

Market context

Erika Sema and Cadence Brace are set to contest a women’s singles match at the ITF Granby tournament in Canada, originally scheduled for 16 July 2026. The prediction market in question bets on which player advances past the other, with the crowd currently assigning just a 1% implied probability to Sema winning. This extreme skew suggests the market views Brace as the overwhelming favourite, a stance that diverges sharply from typical sportsbook pricing for ITF-level contests, where underdogs often retain 10–20% win probability even against higher-ranked opponents.

Historically, 1% implied probabilities in ITF women’s matches have resolved to actual wins only in rare cases involving injuries, disqualifications, or extreme weather cancellations. Comparable contracts from 2024–2025 show that when prediction markets assign single-digit odds to an underdog in ITF events, the actual win rate is typically below 3%, reinforcing the credibility of the current pricing. However, such low probabilities can also mask latent volatility if the favourite is untested on Canadian clay or has a recent injury history not yet reflected in public lines.

Traders should monitor the official ITF Granby schedule for any postponement notices, as the market resolves to 50–50 if the match is delayed beyond seven days without a winner. Brace’s recent form on North American soil and Sema’s fitness status ahead of the event are key catalysts. A late withdrawal by either player, confirmed via the ITF website or tournament social channels, would immediately invalidate the current pricing and trigger a 50–50 resolution. No recent news has indicated such a disruption, but the tight settlement window demands close watch on official updates.

Sources: 1

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

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

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.

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 does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.