Marta Kostyuk vs Iga Swiatek Prediction National Bank Open Toronto · Aug 8, 2026

Analysis

This is a fourth-round meeting in Toronto between two aggressive baseliners, but the gap in overall standing and consistency at this level favours Iga Swiatek clearly. Swiatek's heavy topspin forehand and elite return position let her dictate quickly on medium-paced hard courts, and her second-serve return pressure is the single biggest threat to Kostyuk's service games. Marta Kostyuk hits flat and takes the ball early, which can rush Swiatek and produce a stolen set when her first-serve percentage is high, but that risk-heavy style tends to swing between brilliant and error-strewn across two hours. Toronto's conditions in early August are usually quick and humid, which shortens rallies slightly and helps Kostyuk more than a slower court would. No recent-form data or head-to-head record was supplied for this preview, so the read is based on playing styles, surface fit and general standing rather than specific results. The most likely outcome is a straight-sets win for Swiatek, with a competitive opening set the main threat to that scoreline.