Sofia Costoulas vs Aliona Bolsova — W100 Biarritz Round of 16

W100 Biarritz · CHALLENGER · Round of 16
BEL
Sofia Costoulas
#157WTA
1565ELO
1500Clay ELO
21 yrs
Last 10 · pre-match
LLLWWLWLWW
0 — 0
Sets
Monday, 9 June 2025
clay
Aliona Bolsova
ESP
Aliona Bolsova
#333WTA
1510ELO
1487Clay ELO
28 yrs · 172 cm · Right-handed
Last 10 · pre-match
LWLLWLWLWL
Costoulas S.
7-6 6-4
Bolsova A.
Costoulas S.
7762
Bolsova A.
624–

Sofia Costoulas defeated Aliona Bolsova 7-6 6-4 in the W100 Biarritz round of 16 on clay.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Costoulas S.serving49% hold

wins 50% of points on serve vs Bolsova A.

Bolsova A.serving40% hold

wins 46% 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.Bolsova A.
1st serve in·Clear edge
61%
74%
1st serve points won·Slight edge
69%
58%
2nd serve points won·Even
47%
43%
Service points won·Slight edge
60%
54%
Return points won·Even
45%
47%
Break points saved·Even
57%
53%
Aces / match·Clear edge
3.3
1.1
Double faults / match·Slight edge
2.1
2.7

Averages over each player's completed matches in the selected window (99 vs 68). ATP, WTA & Challenger.

Clutch

Under pressure
Costoulas S.Bolsova A.
Clutch Rating·Dominant
83
18
Break points saved·Dominant
83
30
Break points won·Even
82
80
Deciding sets·Dominant
96
21
Tiebreaks·
—
55

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

Umpiry Score

Pre-match
Costoulas S.
6.4
Marginal edgeUmpiry Score
Bolsova A.
6.4
Marginal edgeUmpiry Score
Form & Matchup
5.8+13 Clay Elo edge
Surface ELO
4.2Clay Elo 1487
6.4Overall Elo 1565
ELO gap
3.6Overall Elo 1510
0.0No prior meetings
H2H
10.0
6.8
Surface form
5.9
Win streak
0.0
Fatigue & Travel
0.0
3-set count
Prev. match
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.Bolsova A.
Freshness·
100
—

Costoulas S.: 21 days rest. Higher means fresher. About

Conditions

Court speed
Slowlow bounce, long rallies
SlowFast

Draw

Final
Sherif M.
Rakotomanga Rajaonah T.
7-56-4
Semi-finals
Sherif M.
Costoulas S.
6-16-3
Rakotomanga Rajaonah T.
Belgraver J.
5-76-26-1
Quarter-finals
Rakotomanga Rajaonah T.
Ambrosio S.
7-56-0
Belgraver J.
Ferro F.
6-26-1
Sherif M.
Burillo Escorihuela I.
7-626-3
Costoulas S.
Inisan E.
6-06-2
R16
Ambrosio S.
Rame A.
6-47-5
Inisan E.
Smith T.
6-16-3
Rakotomanga Rajaonah T.
Hesse A.
6-26-2
Ferro F.
Tararudee L.
5-77-56-1
Costoulas S.
Bolsova A.
7-626-4
Belgraver J.
Mikulskyte J.
6-26-3
Burillo Escorihuela I.
Bara I.
4-66-26-4
Sherif M.
Uebelhoer C.
6-46-4
R32
Inisan E.
Davis L.
6-24-1
Rame A.
Hontama M.
6-36-1
Sherif M.
Fiquet T.
6-16-4
Ferro F.
Portillo Ramirez M.
6-36-2
Hesse A.
Rus A.
6-46-2
Ambrosio S.
Gasanova A.
6-14-67-5
Rakotomanga Rajaonah T.
Buyukakcay C.
6-46-2
Costoulas S.
Schunk N.
6-16-3
Tararudee L.
Sonobe W.
1-66-16-2
Burillo Escorihuela I.
Hietaranta L.
5-76-37-62
Bolsova A.
Iliev S.
6-26-0
Uebelhoer C.
Mpetshi Perricard D.
6-07-63
Belgraver J.
Kabbaj Y.
6-06-2
Bara I.
Rouvroy M.
4-67-56-2
Mikulskyte J.
Oz I.
7-630-0