Pronóstico: National Bank Open: Janice Tjen vs Liudmila Samsonova

Platform comparison

Market context

Polymarket is currently pricing this contract at **0% YES**, which means the market is implying no chance of Janice Tjen advancing over Liudmila Samsonova on the current book. The contract settles in **USDC on Polygon** via conditional tokens, so the outcome is binary unless the match is not played, ends level, or is delayed beyond seven days, in which case it resolves 50-50.

The best comparable frame is their recent head-to-head: Samsonova beat Tjen **2-0 in Abu Dhabi in February 2026**, and again **2-0 in Madrid** later the same season, with Tennis.com’s National Bank Open preview also projecting Samsonova as the likely winner at about **62%**. That history matters because market makers often anchor to repeated direct results and ranking separation rather than to a single upset narrative. At the same time, Tjen’s Toronto listing suggests she is in the main draw against a higher-ranked opponent, so a 0% price is more about the market’s confidence in Samsonova than any certainty about the draw.

For traders, the main catalysts are straightforward: whether the match actually starts on the original schedule, any pre-match injury or withdrawal note, and any change in order of play caused by weather or court scheduling. Because this market has a hard settlement window ending **2026-08-10T14:00:00Z**, a postponement can matter as much as form if it pushes the contest beyond the seven-day rule. Recent match records show Samsonova has handled Tjen comfortably on hard courts, so any late line movement would most likely come from availability news rather than from head-to-head statistics alone.

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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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 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 Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.