Marta Kostyuk vs Katherine Sebov Prediction (Aug 4, 2026)
Result: Marta Kostyuk won. We gave Marta Kostyuk 90% before the match, so our pick (Marta Kostyuk) was right.
Brier score (lower is better): ours 0.010, market six hours out 0.004.
| Our model | Marta Kostyuk 90% · Katherine Sebov 10% |
| Market price at our call | Marta Kostyuk 94% |
| Event | Toronto · Hard |
| Scheduled start | Tue Aug 4, 2026, 02:00 PM ET |
| Call logged | 2026-08-03 15:12 UTC (before first serve) |
Every call we make is logged before the match and graded after it. See the live tennis board, the full match list and our public track record.
All Canadian Open 2026 predictions · Marta Kostyuk predictions
More matches on Aug 4:
- Kamilla Rakhimova vs Katerina Siniakova
- Sara Bejlek vs Iga Swiatek
- Viktorija Golubic vs Donna Vekic
- Ekaterina Alexandrova vs Camila Osorio
- Aryna Sabalenka vs Moyuka Uchijima
- Jessica Bouzas Maneiro vs Elina Svitolina
- Alina Korneeva vs Emma Navarro
- Maja Chwalinska vs Talia Gibson
- Anna Bondar vs Elise Mertens
- Kayla Day vs Coco Gauff
- Anna Kalinskaya vs McCartney Kessler
- Ann Li vs Kayla Cross
- Diana Shnaider vs Rebecca Sramkova
- Jelena Ostapenko vs Shuai Zhang
- Anastasia Potapova vs Elena-Gabriela Ruse
- Daniel Rincon vs Zsombor Piros
- Federico Agustin Gomez vs Henri Squire
- Magdalena Frech vs Jessica Pegula
- Nikola Bartunkova vs Clara Tauson
- Elsa Jacquemot vs Carol Young Suh Lee
- Susan Bandecchi vs Viktoria Hruncakova
- Weronika Ewald vs Justina Mikulskyte
- Thiago Monteiro vs Tom Gentzsch
- Filip Pieczonka vs Harold Mayot
- Alejandro Moro Canas vs Robin Bertrand
- Michael Geerts vs Viktor Durasovic
- Amanda Anisimova vs Lanlana Tararudee
- Maxim Mrva vs Rudolf Molleker
- Raul Brancaccio vs Zdenek Kolar
- Madison Keys vs Antonia Ruzic
- Tiago Pereira vs Vadym Ursu
- Marcelina Podlinska vs Vendula Valdmannova
- Linda Klimovicova vs Elizara Yaneva
- Dalma Galfi vs Ella Seidel
- Andrea Guerrieri vs Olle Wallin
- Damir Dzumhur vs Geoffrey Blancaneaux
- Alex Molcan vs Chun-Hsin Tseng
- Lorenzo Giustino vs Vitaliy Sachko
- Mert Naci Turker vs Alexander Binda
Regulatory Disclosures, Safe-Harbor & Terms of Use
1. Analytical & Research Use Only: iPredictSport is a quantitative research platform publishing statistical estimates for educational, informational, and analytical purposes only. iPredictSport is not an investment adviser, commodity trading advisor (CTA), registered broker-dealer, or sports wagering operator. Nothing contained on this site, in our API, or in our newsletters constitutes financial advice, investment recommendations, or sports betting advice.
2. Hypothetical & Simulated Performance (CFTC Rule 4.41): Performance figures for our autonomous paper agent and proposed bet track records are simulated, hypothetical, and based on paper audits. Unlike an actual performance record, simulated results do not represent actual trading, may not reflect market liquidity, exchange slippage, or trading bans, and cannot account for psychological risk factors. No representation is made that any user will or is likely to achieve profits or losses similar to those shown. Past performance does not guarantee future results.
3. Market Risk & Capital Loss: Trading binary contracts on prediction markets (such as Kalshi or Polymarket) or placing sports wagers involves substantial financial risk, including the possible loss of 100% of staked capital. Odds and spreads fluctuate continuously. Users assume sole responsibility for their own trading decisions and bankroll sizing.
4. Responsible Gaming & Age Requirements: Fliff sweepstakes is available to legal residents aged 18+ in eligible states. Financial prediction exchanges (including Kalshi) require 18+, and commercial sportsbooks require 21+, subject to jurisdiction. If you or someone you know has a gambling problem and wants help, confidential crisis counseling and referral services can be accessed 24/7 by calling 1-800-GAMBLER (1-800-426-2537) or visiting ncpgambling.org.
5. Affiliate & Compensation Disclosure: iPredictSport may receive affiliate commissions, referral fees, or cost-per-acquisition (CPA) compensation from links to partners (including Fliff, Kalshi, and Polymarket) at no additional cost to you. For Fliff, attribution requires entry of promo code IPREDICT or IPSLIVE in the mobile app. Fliff is a sweepstakes sports product for adults 18+ and is void where prohibited by law (18 excluded states). This commercial compensation does not alter our objective quantitative probabilities, model outputs, or editorial gates.
Full text: Terms of Use · Disclaimer · Affiliate & Advertising Disclosure · Privacy Policy