Marta Kostyuk vs Katherine SebovToronto Round of 64

Toronto · WTA · Round of 64
#11WTA
2057ELO
1968Hard ELO
$3.5MYTD
$10MCAREER
24 yrs · 175 cm · Right-handed
Last 10 · pre-match
WWWLWLWWWW
2 — 0
Sets
Tuesday, 4 August 2026 ·
hard
#213WTA
1407ELO
1401Hard ELO
27 yrs · 173 cm · Right-handed
Last 10 · pre-match
WLWWWLWLWW
Kostyuk M.
7-6 6-0
Sebov K.
Kostyuk M.
7762
Sebov K.
6400

Marta Kostyuk defeated Katherine Sebov in the Round of 64 at the Toronto hard-court tournament. The match ended with a score of 7-6, 6-0 in favor of Kostyuk. Kostyuk hit 5 aces and converted 86% of her break points, securing 6 service breaks to Sebov's 3.

Key context

Head to head

10
DateTournamentRoundSurfaceWinnerScore
2021-08-23Chicago 1R32hardMarta Kostyuk6-0 6-3

Statistics

This season
1st serve in·Clear edge
58%
78%
1st serve points won·Clear edge
70%
57%
2nd serve points won·Even
48%
49%
Service points won·Slight edge
61%
55%
Return points won·Even
48%
45%
Break points saved·Slight edge
62%
55%
Aces / match·Clear edge
3.5
0.7
Double faults / match·Dominant
4.1
1.8

Averages over each player's completed matches in the selected window (32 vs 33). ATP, WTA & Challenger.

Clutch

Under pressure
Clutch Rating·Dominant
86
51
Break points saved·Clear edge
72
53
Break points won·Slight edge
94
83
Deciding sets·Dominant
95
64
Tiebreaks·
80

Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About

Win Probability

Pre-match · updated 17:50 UTC
Kostyuk M.90%
Sebov K.10%
Toss-up
50–58%
Slight edge
58–67%
Clear favourite
67–80%
Strong favourite
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.

Umpiry Score

Pre-match
7.2
Strong advantageUmpiry Score
5.1
Clear underdogUmpiry Score
Form & Matchup
10.0+567 Hard Elo edge
Surface ELO
0.0Hard Elo 1401
10.0Overall Elo 2057
ELO gap
0.0Overall Elo 1407
5.0First meeting on hard
H2H
5.0First meeting on hard
5.46 of last 10 on hard
Surface form
6.26 of last 10 on hard
0.0
Win streak
Fatigue & Travel
7.0Grass → Hard
Surface transition
Context
5.0Didn't play here last year
Defending pts
5.0Didn't play here last year

The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.

Freshness

Recent load
Freshness·Dominant
66
100

Kostyuk M.: 1 day rest · 2 matches, 55 games (7d) · Sebov K.: 15 days rest. Higher means fresher. About

Conditions

Court speed
Mediumbalanced pace
SlowFast
Weather
25°CClear
Wind 14 km/hHumidity 53%

Draw