Marta Kostyuk vs Katherine Sebov — Toronto Round of 64
UKR10
Kostyuk M.
Marta Kostyuk faces Katherine Sebov in the Toronto round of 64 on hard. Marta Kostyuk holds the paper edge — ranked #11, leading the head-to-head 1–0, a roughly 570-point hard Elo advantage.
Win Probability
Pre-match · updated 03:50 UTC50–58%
58–67%
67–80%
80%+
Strong favourite · Kostyuk M. heavily favoured
Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
Key context
- Under pressure: In the tight moments, Marta Kostyuk has rated higher under pressure (Clutch Rating 83 vs 51).
- Head-to-head: Marta Kostyuk leads the head-to-head 1–0. Last met at Chicago 1 2021.
Common opponents
Last 12 monthsUmpiry Score
Pre-matchThe Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Statistics
This seasonAverages over each player's completed matches in the selected window (30 vs 31). ATP, WTA & Challenger.
Serve vs return
This seasonEach player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Clutch
Under pressurePerformance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Freshness
Recent loadSebov K.: 5 days rest · 2 matches, 39 games (7d). Higher means fresher. About
Conditions
Head to head
1–0| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-08-23 | Chicago 1 | R32 | hard | Marta Kostyuk | 6-0 6-3 |