Warsaw: Gabriela Knutson vs Sofia Costoulas

Platform comparison

Market context

Gabriela Knutson and Sofia Costoulas are the underlying players in a Warsaw women’s singles match, with the market currently pricing a full **100% YES** outcome. That is materially more bullish than most public tennis price feeds on the same fixture: one bookmaker-facing source has Costoulas around 1.45 and Knutson 2.60, while other model-style pages point to Costoulas as the likelier winner, generally in the mid-60s percentage range. [2][1][8]

For a programme-driven trader, the key comparison is not the raw favourite label but the gap between the market’s near-certainty and the underlying event risk. Tennis head-to-head data on aggregator pages show limited direct history, with Costoulas leading the matchup 1–0 on one source, and season records on another page suggesting Costoulas has had the stronger 2026 hard-court profile. That matters because conditional-order or bot logic should treat a 100% read as brittle if the event has not yet been formally completed: a cancellation, tie, or delay beyond seven days would still force a 50-50 settlement under the market rules. [11][6][12]

The main catalysts to monitor are whether the match is officially started, completed, or removed from the order of play, plus any draw re-shuffles, court changes, or weather delays that could push settlement into the fallback window. Live scoreboards and odds boards were still listing the fixture on 3 August 2026, so a bot should poll the event status rather than rely on pre-match pricing alone, especially where one player’s advancement is the actual settlement trigger rather than set score. [7][2][10]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.