Sofia Costoulas vs Haruka Kaji — W75 Kofu Semi-final

W75 Kofu · CHALLENGER · Semi-final
BEL
Sofia Costoulas
#156WTA
1565ELO
1569Hard ELO
21 yrs
Last 10 · pre-match
LLLWWLWLWW
0 — 0
Sets
Monday, 16 March 2026
hard
JPN
Haruka Kaji
#270WTA
1421ELO
1412Hard ELO
31 yrs · Right-handed
Last 10 · pre-match
LWWWLWLWLW
Costoulas S.
6-1 6-0
Kaji H.
Costoulas S.
662
Kaji H.
10–

Sofia Costoulas defeated Haruka Kaji 6-1 6-0 in the W75 Kofu semi-final on hard.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Costoulas S.serving60% hold

wins 54% of points on serve vs Kaji H.

Kaji H.serving53% hold

wins 51% of points on serve vs Costoulas S.

Baseline battle — serve is shaky, expect plenty of breaks

Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About

Statistics

This season
Costoulas S.Kaji H.
1st serve in·Slight edge
60%
68%
1st serve points won·Slight edge
69%
59%
2nd serve points won·Slight edge
44%
50%
Service points won·Even
59%
56%
Return points won·Even
45%
45%
Break points saved·Even
53%
52%
Aces / match·Clear edge
3.4
1.2
Double faults / match·Clear edge
2.9
2.0

Averages over each player's completed matches in the selected window (34 vs 26). ATP, WTA & Challenger.

Clutch

Under pressure
Costoulas S.Kaji H.
Clutch Rating·Dominant
83
56
Break points saved·Dominant
83
52
Break points won·Slight edge
82
91
Deciding sets·Dominant
96
69
Tiebreaks·
—
—

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

Umpiry Score

Pre-match
Costoulas S.
6.1
Even matchUmpiry ScorePartial · surface data limited
Kaji H.
5.8
Slight disadvantageUmpiry ScorePartial · surface data limited
Form & Matchup
5.0No prior meetings
H2H
5.0
5.1
Surface form
4.4
0.0Lost last 2
Win streak
0.0
Fatigue & Travel
3-set count
0.0
Context
5.0
Defending pts
5.0

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
Costoulas S.Kaji H.
Freshness·
100
—

Costoulas S.: 18 days rest. Higher means fresher. About

Conditions

Court speed
Medium-slowfavours grinders
SlowFast

Draw

Final
Costoulas S.
Ma Y.
7-56-3
Semi-finals
Costoulas S.
Kaji H.
6-16-0
Ma Y.
You X.
3-66-26-0
Quarter-finals
You X.
Morvayova V.
6-36-0
Ma Y.
Zhu L.
0-66-40-0
Kaji H.
Hibino N.
0-66-46-3
Costoulas S.
Kinoshita H.
6-42-67-5
R16
You X.
Von Deichmann K.
4-67-56-2
Hibino N.
Abe H.
6-46-3
Morvayova V.
Preston T.
6-46-2
Kinoshita H.
Saito S.
6-46-0
Kaji H.
Noguchi S.
6-36-3
Ma Y.
Cabrera L.
7-646-1
Costoulas S.
Liu C.
6-746-37-63
Zhu L.
Yamaguchi M.
6-36-0
R32
Yamaguchi M.
Tsuji S.
6-16-2
Preston T.
Sawashiro K.
4-66-06-2
You X.
Shimizu E.
6-36-1
Abe H.
Sato H.
3-66-16-3
Kinoshita H.
Ozeki M.
6-26-1
Hibino N.
Hasegawa M.
6-06-0
Noguchi S.
Hontama M.
7-52-1
Costoulas S.
Serban R.
6-36-4
Cabrera L.
Ishii S.
6-46-4
Morvayova V.
Hosogi S.
6-16-0
Kaji H.
Sakatsume H.
3-66-37-5
Zhu L.
Ito A.
6-06-2
Ma Y.
Dart H.
4-67-650-0
Saito S.
Ku Y.
6-26-2
Liu C.
Shibahara E.
4-66-16-1
Von Deichmann K.
Iatcenko P.
6-00-0