National Bank Open: Liudmila Samsonova vs Barbora Krejcikova

Platform comparison

Market context

Liudmila Samsonova and Barbora Krejcikova are scheduled for a second-round match at the National Bank Open in Toronto on outdoor hard courts, with Tennis.com listing Krejcikova as the projected winner but only by a moderate margin despite the market showing a crowd-implied 100% YES price on the Samsonova side. [1][2][4] For a programmatic trader, that kind of disconnect is a signal to check whether the market is pricing a confirmed result, a stale feed, or an administrative issue rather than simply reacting to the sporting matchup itself. [1][4][9]

Comparable history gives the market some shape: Krejcikova has reportedly struggled at this event, while Samsonova reached the National Bank Open final in 2023, and their recent head-to-head has leaned towards Samsonova on hard courts. [2][13][19] TennisMajors and other match databases also show a close overall rivalry, which is useful for automation logic because it suggests the price should normally be sensitive to late lineups and form rather than treated as a one-way certainty. [3][17][18]

The main catalysts are operational rather than tactical: official match order, whether play actually begins on Court 1, and any delay beyond seven days from the scheduled date, which would push the market to the 50-50 settlement rule. [1][9] Live tennis listings are already showing the fixture as upcoming or on court, so bots that monitor settlement conditions should watch for draw updates, official start-time changes, and any abandonment signal before expiry on 13 August 2026. [1][5][6]

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 Kalshi Fees, which mirrors the Polymarket order book directly.

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

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'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.

Do I need to KYC for this market?

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