National Bank Open: Janice Tjen vs Liudmila Samsonova

Platform comparison

Market context

Janice Tjen’s meeting with Liudmila Samsonova in Toronto is a hard-court WTA match that the market is currently pricing at 0% YES, which already signals a strong mismatch or at least a heavily one-sided expectation. The main comparable case is their only recorded head-to-head in Abu Dhabi on 3 February 2026, when Samsonova beat Tjen 6-2, 6-2 on hard court[1][7][8]. On ranking context alone, Samsonova has been listed around WTA No. 22, with Tjen around No. 40, while another tournament page showed Samsonova’s career-high singles ranking at No. 12[3][5].

For a programme-driven trader, the useful angle is to treat this as a dependency-heavy event rather than a pure price read. The market settles on who advances, so the key inputs are whether the match is actually staged, whether it is completed, and whether any withdrawal or postponement pushes it into the 50-50 rule set. In practice, a bot would watch the tournament order of play, live draw status, and official score feeds for retirement or suspension flags, because the contract can flip from a normal match outcome to a half-settlement style result if the contest is not completed within the settlement window.

Recent form also frames the baseline: the available match pages show Samsonova winning their only prior meeting in straight sets, with the head-to-head still 1-0 in her favour[1][16]. Tjen’s recent numbers have been noisier across the season, while Samsonova’s hard-court profile remains the more established one, so the 0% YES implies the market is already treating Tjen’s path as needing an upset, a late withdrawal, or a scheduling failure rather than a straightforward on-court win[2][10][18].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Janice Tjen vs Liudmila Samsonova 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

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.