Pronóstico: National Bank Open: Sorana Cirstea vs Maya Joint

Platform comparison

Market context

Polymarket has this contract at **0% YES** right now, even though tennis listings show Sorana Cîrstea against Maya Joint as an upcoming National Bank Open second-round match on hard court in Toronto. On Polymarket, the position settles in **USDC** via **Polygon**-based conditional tokens, so the price reflects the market’s view of whether the match is actually advanced by Cîrstea rather than the broader tournament narrative.

For context, the available tennis data point to Cîrstea as the more established player: Tennis.com lists her as the projected winner at 75%, while other pre-match models also lean her way, including a head-to-head edge after a straight-sets win over Joint at Indian Wells in 2025.[1][9][15] That sort of pre-match favourite status matters for reading a near-zero market price, because a 0% quote usually signals either a stale order book, a listing issue, or traders treating a routine favourite outcome as effectively unpriceable rather than as a genuine 50-50 risk.

The key catalysts are simple: whether the match actually starts, whether the schedule changes, and whether either player withdraws or is forced off court before completion. Match pages are still showing the contest as scheduled with varying local start-time conversions, so the practical watch-items are official WTA scoreboards, tournament order-of-play updates, and any last-minute injury or weather-related reshuffling.[2][13][16] If the match is not played, is tied, or slips beyond the contract’s seven-day grace period without a winner, the market is set to resolve 50-50 instead of to either player.

Sources: 1 · 2 · 3 · 4 · 5

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 Polymarket Qué Es, 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

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.

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.