J J Wolf vs Stefan Kozlov — Cleveland CH Quarter-final

Cleveland CH · CHALLENGER · Quarter-final
J J Wolf
USA8
J J Wolf
27 yrs · 183 cm · Right-handed
Last 10 · pre-match
LLWLLLLLLW
2 — 0
Sets
Monday, 27 January 2025
hard
Stefan Kozlov
USA
Stefan Kozlov
#317ATP
1429ELO
1408Hard ELO
28 yrs · 183 cm · Right-handed
Last 10 · pre-match
LWWWLLWWLW
Wolf J.
6-1 6-3
Kozlov S.
Wolf J.
662
Kozlov S.
130

J J Wolf defeated Stefan Kozlov 6-1 6-3 in the Cleveland CH quarter-final on hard. The result followed the form book — J J Wolf came in leading the head-to-head 1–0. J J Wolf extended the head-to-head to 2–0.

Key context

Head to head

1–0
DateTournamentRoundSurfaceWinnerScore
2022-09-19San DiegoR32hardJ J Wolf6-2 7-6(6)

Serve vs return

This season
Wolf J.serving72% hold

wins 59% of points on serve vs Kozlov S.

Kozlov S.serving76% hold

wins 61% of points on serve vs Wolf J.

Serve advantage — Kozlov S.

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
Wolf J.Kozlov S.
1st serve in·Even
59%
62%
1st serve points won·Slight edge
73%
67%
2nd serve points won·Even
48%
49%
Service points won·Even
63%
60%
Return points won·Slight edge
38%
43%
Break points saved·Even
55%
57%
Aces / match·Clear edge
5.0
2.5
Double faults / match·Slight edge
2.3
3.0

Averages over each player's completed matches in the selected window (13 vs 66). ATP, WTA & Challenger.

Clutch

Under pressure
Wolf J.Kozlov S.
Clutch Rating·Dominant
61
36
Break points saved·Dominant
93
49
Break points won·Dominant
49
20
Deciding sets·Clear edge
66
85
Tiebreaks·Dominant
60
30

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

Umpiry Score

Pre-match
Wolf J.
4.9
Heavy underdogUmpiry ScorePartial · surface data limited
  • Recent retirement (−1.5)
Kozlov S.
6.4
Marginal edgeUmpiry ScorePartial · surface data limited
Form & Matchup
4.6
H2H
5.4
6.2
Surface form
5.8
Win streak
0.0
Fatigue & Travel
6.5
Minutes 14d
6.6
7.0
3-set count
7.0
Prev. match
6.0
Context
5.0
Defending pts
6.0

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
Wolf J.Kozlov S.
Freshness·Dominant
95
53

Wolf J.: 11 days rest · 1 match (14d) · Kozlov S.: 1 day rest · 4 matches, 106 games (7d). Higher means fresher. About

Conditions

Court speed
Fastbig serves, short points
SlowFast
Final
Smith C.
Spizzirri E.[6]
6-46-766-3
Semi-finals
Spizzirri E.[6]
Zink T.
6-46-3
Smith C.
Wolf J.[8]
7-676-1
Quarter-finals
Wolf J.[8]
Kozlov S.
6-16-3
Zink T.
Cassone M.
6-747-617-5
Smith C.
Sell K.[7]
7-646-2
Spizzirri E.[6]
Trotter J.[4]
5-76-37-64
R16
Zink T.
Holt B.[5]
W/O
Spizzirri E.[6]
Mmoh M.
6-47-5
Cassone M.
Aguilar J.
6-16-4
Trotter J.[4]
Hilderbrand T.
6-736-26-4
Wolf J.[8]
Ghibaudo A.
7-6114-66-3
Kozlov S.
Bigun K.
6-26-3
Smith C.
Dostanic S.
6-46-4
Sell K.[7]
Kingsley C.
6-46-4
R32
Ghibaudo A.
Mccormick T.
6-36-3
Spizzirri E.[6]
Escobedo E.
6-46-3
Mmoh M.
Rybakov A.
6-736-36-2
Sell K.[7]
Ayeni O.
6-37-65
Wolf J.[8]
Brooksby J.
6-26-4
Zink T.
Mayo A.
6-36-4
Kingsley C.
Pinnington Jones J.
6-16-4
Dostanic S.
Seggerman R.
7-687-5
Aguilar J.
Ross J.
6-46-2
Holt B.[5]
Ivanovski K.
6-16-1
Smith C.
Quinn E.[3]
1-66-16-4
Bigun K.
Albot R.[2]
6-37-67
Cassone M.
Gomez F.[1]
7-656-4
Trotter J.[4]
Pieczonka F.
6-33-67-64
Hilderbrand T.
Ponwith N.
7-654-66-0
Kozlov S.
Braswell M.
4-66-36-4