Katie Volynets vs Sofia Costoulas — Us Open Qualifying Round 1

Us Open · CHALLENGER · Qualifying Round 1
Katie Volynets
USA
Katie Volynets
#101WTA
1786ELO
1736Hard ELO
24 yrs · 170 cm · Right-handed
Last 10 · pre-match
WWWWLWWLWW
0 — 0
Sets
Monday, 25 August 2025
hard
BEL
Sofia Costoulas
#156WTA
1565ELO
1569Hard ELO
21 yrs
Last 10 · pre-match
LLLWWLWLWW
Volynets K.
6-3 6-4
Costoulas S.
Volynets K.
662
Costoulas S.
34–

Katie Volynets defeated Sofia Costoulas 6-3 6-4 in the Us Open qualifying round 1 on hard. The result followed the form book — Katie Volynets came in ranked #101.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Volynets K.serving49% hold

wins 50% of points on serve vs Costoulas S.

Costoulas S.serving54% hold

wins 52% of points on serve vs Volynets K.

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

Serve & return on hard

Volynets K.Costoulas S.
8
Serve
—
49
Return
—

Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About

Statistics

This season
Volynets K.Costoulas S.
1st serve in·Clear edge
79%
61%
1st serve points won·Slight edge
58%
69%
2nd serve points won·Even
44%
47%
Service points won·Slight edge
55%
60%
Return points won·Even
48%
45%
Break points saved·Even
55%
58%
Aces / match·Clear edge
1.1
3.2
Double faults / match·Clear edge
1.1
2.1

Averages over each player's completed matches in the selected window (92 vs 99). ATP, WTA & Challenger.

Clutch

Under pressure
Volynets K.Costoulas S.
Clutch Rating·Clear edge
67
83
Break points saved·Slight edge
75
83
Break points won·Clear edge
97
82
Deciding sets·Dominant
70
96
Tiebreaks·
56
—

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

Umpiry Score

Pre-match
Volynets K.
6.2
Even matchUmpiry Score
Costoulas S.
5.1
Clear underdogUmpiry Score
  • Extended break: 28 days (−0.3)
Form & Matchup
6.5+166 Hard Elo edge
Surface ELO
3.5Hard Elo 1569
6.7Overall Elo 1786
ELO gap
3.3Overall Elo 1565
5.0No prior meetings
H2H
5.0
2.2
Surface form
5.6
0.0Lost last 2
Win streak
Fatigue & Travel
7.0
Prev. match
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
Volynets K.Costoulas S.
Freshness·Dominant
61
100

Volynets K.: 1 day rest · 3 matches, 70 games (7d) · Costoulas S.: 18 days rest. Higher means fresher. About

Conditions

Court speed
Fastbig serves, short points
SlowFast

Draw — qualifying

Q3
Valentova T.
Rus A.
6-26-2
Tjen J.
Ito A.
6-16-2
Galfi D.
Udvardy P.
6-36-4
Hon P.
Vandewinkel H.
6-36-3
Shibahara E.
Gracheva V.
6-06-4
Volynets K.
Fett J.
5-76-26-3
Jimenez Kasintseva V.
Jones E.
7-57-67
Wang X.
Charaeva A.
6-44-66-2
Selekhmeteva O.
Akli A.
7-52-66-2
Marino R.
Salkova D.
6-32-66-1
Inoue H.
Stefanini L.
7-646-1
Liu C.
Erjavec V.
7-56-4
Jones F.
Hartono A.
6-26-4
Aiava D.
Seidel E.
5-76-17-66
Zhang S.
Wei S.
6-16-3
Semenistaja D.
Klimovicova L.
6-37-60
Q2
Hartono A.
Gadecki O.
6-44-66-4
Tjen J.
Chwalinska M.
7-57-5
Vandewinkel H.
Tomova V.
3-67-56-4
Hon P.
Niemeier J.
6-46-3
Volynets K.
Honer A.
6-26-741-0
Fett J.
Andrianjafitrimo T.
6-757-56-4
Aiava D.
Mikulskyte J.
2-66-16-4
Wei S.
Romero Gormaz L.
4-66-16-1
Jones E.
Pigossi L.
6-46-4
Charaeva A.
Marcinko P.
1-66-17-5
Wang X.
Martic P.
7-56-4
Marino R.
Hontama M.
6-12-66-1
Selekhmeteva O.
Shymanovich I.
6-26-3
Salkova D.
Dmitruk K.
6-35-77-68
Inoue H.
Waltert S.
6-36-2
Liu C.
Inglis M.
6-37-5
Erjavec V.
Brace C.
6-46-4
Jones F.
Gorgodze E.
6-17-611
Valentova T.
Prozorova T.
7-56-1
Rus A.
Burrage J.
6-746-46-4
Ito A.
Maristany Zuleta De Reales G.
6-01-66-1
Galfi D.
Crawley F.
6-26-2
Udvardy P.
Leonard M.
6-26-1
Gracheva V.
Wurth T.
7-56-2
Shibahara E.
Pridankina E.
7-657-67
Seidel E.
Vickery S.
6-16-2
Zhang S.
Vidmanova D.
6-46-0
Jimenez Kasintseva V.
Sharma A.
2-66-36-3
Semenistaja D.
Cabrera L.
6-16-2
Klimovicova L.
Ponchet J.
6-36-3
Akli A.
Dart H.
7-646-1
Stefanini L.
Zhao C.
6-16-4
Q1
Jones F.
Hruncakova V.
6-36-4
Gorgodze E.
Watson H.
3-66-36-4
Hartono A.
Sanchez A.
2-66-46-3
Gadecki O.
Koevermans A.
3-66-36-1
Valentova T.
Barthel M.
6-26-4
Burrage J.
Tig P.
6-46-0
Rus A.
Martinez Cirez C.
6-46-2
Ito A.
Friedsam A.
6-45-76-3
Chwalinska M.
Pedone G.
6-26-0
Tjen J.
Lepchenko V.
6-36-1
Maristany Zuleta De Reales G.
Rakotomanga Rajaonah T.
6-27-64
Galfi D.
Urhobo A.
6-26-4
Udvardy P.
Ormaechea P.
6-46-1
Tomova V.
Burillo Escorihuela I.
6-36-0
Niemeier J.
Saville D.
6-06-2
Hon P.
Brancaccio N.
7-56-4
Gracheva V.
Brengle M.
7-56-3
Wurth T.
Rodionova A.
6-17-5
Pridankina E.
Palicova B.
5-76-36-4
Shibahara E.
Day K.
7-56-1
Volynets K.
Costoulas S.
6-36-4
Honer A.
Osuigwe W.
6-26-3
Andrianjafitrimo T.
Hercog P.
5-76-26-4
Aiava D.
Bejlek S.
6-44-66-4
Mikulskyte J.
Okamura K.
6-37-5
Zhang S.
Stoiana M.
7-56-3
Vidmanova D.
Iyengar M.
6-16-2
Wei S.
Cengiz B.
6-26-2
Romero Gormaz L.
Naef C.
6-46-4
Jones E.
Pera B.
6-14-66-2
Pigossi L.
Zidansek T.
5-77-626-3
Sharma A.
Radivojevic L.
7-56-4
Jimenez Kasintseva V.
Nguyen A.
6-27-5
Marcinko P.
Gao X.
6-26-1
Charaeva A.
Ekstrand M.
6-36-4
Martic P.
Fruhvirtova L.
6-36-0
Semenistaja D.
Lazaro Garcia A.
2-66-27-5
Cabrera L.
Oliynykova O.
6-26-4
Ponchet J.
Mandlik E.
6-46-2
Dart H.
Todoni A.
7-56-737-66
Shymanovich I.
Kraus S.
6-32-67-5
Salkova D.
Grabher J.
7-53-66-2
Hontama M.
Penickova K.
6-04-67-64
Marino R.
Tararudee L.
6-32-67-5
Zhao C.
Carle M.
7-686-2
Brace C.
Hibino N.
2-66-36-3
Erjavec V.
Timofeeva M.
6-36-1
Vickery S.
Soboleva A.
7-57-5
Stefanini L.
Diatchenko V.
7-666-2
Inoue H.
Davis L.
6-16-2
Waltert S.
Snigur D.
4-66-16-2
Prozorova T.
Trevisan M.
6-36-3
Crawley F.
Chirico L.
6-26-3
Leonard M.
Nahimana S.
6-36-4
Vandewinkel H.
Stakusic M.
6-36-2
Fett J.
Garland J.
6-26-4
Seidel E.
Von Deichmann K.
6-36-2
Wang X.
Branstine C.
3-66-36-3
Klimovicova L.
Korneeva A.
7-646-726-4
Akli A.
Vedder E.
7-56-2
Selekhmeteva O.
Riera J.
2-66-06-3
Dmitruk K.
Juvan K.
7-56-4
Liu C.
Kawa K.
6-16-3
Inglis M.
Hunter S.
6-36-4