Pronóstico: ITF Granby: Erika Sema vs Cadence Brace

Platform comparison

Market context

The ITF Women’s Granby match between Erika Sema and Cadence Brace, originally set for 16 July 2026 at 6:00 PM ET, has not yet been played, yet Polymarket prices the YES contract for Sema advancing at 0% as of Friday, 17 July. This near-zero implied probability suggests the market views Sema’s advancement as virtually impossible, likely due to unconfirmed withdrawal, injury, or scheduling collapse rather than pure competitive odds. On Polygon, the contract trades in USDC using conditional tokens, where liquidity is thin and price discovery hinges on binary news rather than form guides.

Historically, ITF-level matches with 0% crowd-implied probability for a named player often resolve to the 50-50 tiebreaker when cancellations occur before play begins, as seen in the 2024 ITF Monastir women’s singles where a 0% favourite contract settled evenly after a double no-show. In such cases, the on-chain mechanism treats unplayed matches identically to ties, overriding initial sentiment. Traders should note that conditional token payouts on Polymarket do not adjust for partial play unless a winner is officially declared, making the 7-day delay clause critical.

Watch for official ITF Canada announcements on the Granby draw, player status updates from Tennis Canada, or schedule revisions on the ITF website, as these are the primary catalysts that could shift the 0% price. A recent Tennis Canada bulletin from 15 July confirmed no cancellations for Granby’s opening round, but no specific mention of Sema or Brace, leaving room for last-minute withdrawals [1]. Until formal confirmation arrives, the contract remains a binary bet on administrative resolution rather than match outcome.

Methodology

We track Pronóstico: ITF Granby: Erika Sema vs Cadence Brace 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.

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.

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.