Sofia Costoulas vs Claire Liu — W75 Kofu Round of 16

W75 Kofu · CHALLENGER · Round of 16
BEL
Sofia Costoulas
#157WTA
1565ELO
1569Hard ELO
21 yrs
Last 10 · pre-match
LLLWWLWLWW
2 — 1
Sets
Monday, 16 March 2026
hard
Claire Liu
USA
Claire Liu
#111WTA
1669ELO
1635Hard ELO
26 yrs · 170 cm · Right-handed
Last 10 · pre-match
WWLLWWWWWL
Costoulas S.
6-7 6-3 7-6
Liu C.
Costoulas S.
646772
Liu C.
773631

Sofia Costoulas defeated Claire Liu 6-7 6-3 7-6 in the W75 Kofu round of 16 on hard. The upset overturned the form book — Claire Liu came in ranked #111.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Costoulas S.serving53% hold

wins 51% of points on serve vs Liu C.

Liu C.serving50% hold

wins 50% 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.Liu C.
1st serve in·Slight edge
60%
69%
1st serve points won·Slight edge
70%
59%
2nd serve points won·Even
43%
45%
Service points won·Even
59%
55%
Return points won·Even
45%
48%
Break points saved·Even
54%
55%
Aces / match·Slight edge
3.3
2.5
Double faults / match·Even
2.8
2.5

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

Clutch

Under pressure
Costoulas S.Liu C.
Clutch Rating·Clear edge
83
61
Break points saved·Clear edge
83
64
Break points won·Even
82
78
Deciding sets·Clear edge
96
79
Tiebreaks·
—
67

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 Score
Liu C.
6.1
Even matchUmpiry Score
Form & Matchup
4.9Hard Elo 1569
Surface ELO
5.1+66 Hard Elo edge
5.1Overall Elo 1565
ELO gap
4.9Overall Elo 1669
5.0No prior meetings
H2H
5.0
5.1
Surface form
4.8
0.0Lost last 2
Win streak
0.0
Fatigue & Travel
3-set count
7.0
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.Liu C.
Freshness·Dominant
100
75

Costoulas S.: 20 days rest · Liu C.: 1 day rest · 2 matches, 37 games (7d). 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