National Bank Open, Qualification: Sofia Kenin vs Lucrezia Stefanini

Platform comparison

Market context

Sofia Kenin’s qualifier against Lucrezia Stefanini is a hard-court meeting between a former world No. 4 and a player ranked outside the top 100, so the market should be read as a test of whether Kenin’s higher ceiling outweighs her recent inconsistency. Tennis.com lists Kenin at WTA No. 116 and Stefanini at No. 144 for this match, while the head-to-head is 0-0, leaving little direct history to anchor prices.[11][4]

The broader form picture is mixed rather than dominant. Tennisstats shows Kenin at 21.7% for the 2026 calendar year and 29.0% over the last 12 months, compared with Stefanini at 52.5% and 50.9% respectively, which helps explain why a zero-centred crowd line can still leave room for a short-price favourite if the market is treating Kenin’s class as the key edge.[1] Tennis Tonic’s recent results panel also shows Kenin coming in off a run of losses, while Stefanini’s recent sequence is more positive, a contrast that makes pre-match momentum part of the read rather than raw ranking alone.[2]

For traders, the key catalysts are whether the match actually begins on schedule and whether either player is subject to a late withdrawal or rescheduling, because the settlement rules flip to 50-50 if it is not played or is delayed beyond seven days. Live listings from Flashscore, SofaScore and Tennis.com all point to the same qualifying fixture in Toronto, but they also show the sort of calendar volatility that can matter in WTA qualifying, where one cancellation, walkover or weather interruption can change the outcome path quickly.[3][4][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for National Bank Open, Qualification: Sofia Kenin vs Lucrezia Stefanini. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.