National Bank Open: Antonia Ruzic vs Madison Keys

Platform comparison

Market context

Antonia Ružić’s meeting with Madison Keys is a straightforward strength-versus-upside clash, and the market’s **0% YES** price is much lower than the broader pre-match consensus. Keys was still the clear favourite in the available pricing and model snapshots, with external markets putting her around the low-80s to high-80s in implied win probability, while Ružić was generally priced in the teens[7][9][14]. The pair also have a short recent head-to-head history: Keys beat Ružić 6-4, 6-4 at Roland-Garros earlier this season, which is the cleanest recent comparison for how this matchup has played[1][13].

For traders, the key catalyst is whether the match is actually completed within the settlement window, because the contract flips to 50-50 if the contest is cancelled, tied, or delayed beyond seven days without a winner. On-court, the main live dependency is Keys’ physical and form check after her Washington loss to Liudmila Samsonova, her first opening-round defeat of the season, versus whether Ružić can lift above her previous hard-court baseline in Toronto[1][12]. The market is also sensitive to scheduling and retirement risk in a compact WTA draw: if either player withdraws before play, or the match is interrupted after starting, the settlement outcome depends on whether a winner is officially advanced rather than the scoreline itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for National Bank Open: Antonia Ruzic vs Madison Keys. 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 (US-focused) or Manifold (play-money).

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.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.

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.