Stefan Kozlov vs J J Wolf — Columbus CH Semi-final

Columbus CH · CHALLENGER · Semi-final
USA
Stefan Kozlov
#292ATP
1429ELO
1408Hard ELO
28 yrs · 183 cm · Right-handed
Last 10
LWLWWWLLWL
2 — 1
Sets
Monday, 20 September 2021
hard
USA
J J Wolf
[7]
#921ATP
27 yrs · 183 cm · Right-handed
Last 10
LWLLLLLLWW

Umpiry Score

Pre-match
Kozlov S.
4.3
Heavy underdogUmpiry ScorePartial · surface data limited
  • Recent retirement (−1.5)
Wolf J.
4.9
Heavy underdogUmpiry ScorePartial · surface data limited
  • Extended break: 35 days (−0.7)
Form & Matchup
0.0
H2H
10.0
5.5
Surface form
2.6
0.0Lost last 2
Win streak
0.0Lost last 3
Fatigue & Travel
8.1
Minutes 14d
9.0
Prev. match
Context
5.0
Defending pts

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.

Kozlov S.
2672
Wolf J.
6351

Head to head

3–5
DateTournamentRoundSurfaceWinnerScore
2025-01-27Cleveland CHQFhardJ J Wolf6-1 6-3
2024-07-01Bloomfield Hills CHQFhardStefan Kozlov6-4 6-4
2022-09-19San DiegoR32hardJ J Wolf6-2 7-6(6)
2021-11-15Champaign CHSFhardStefan Kozlov6-2 6-3
2021-11-01Charlottesville CHSFhardStefan Kozlov6-1 6-7(1) 6-0
2021-10-25Las Vegas CHFhardJ J Wolf6-4 6-4
2019-11-11Champaign-Urbana CHQFhardJ J Wolf6-2 6-2
2019-01-07Columbus CHR64hardJ J Wolf6-2 7-6(4)

Statistics

Recent form
Kozlov S.Wolf J.
60%1st serve in+3%57%
66%1st serve points won+6%72%
49%2nd serve points won+2%47%
59%Service points won+2%61%
41%Return points won+2%39%
54%Break points saved+4%58%
2.9Aces / match+3.66.5
3.5Double faults / match+0.33.2

Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.

Draw

Final
Kozlov S.
Purcell M.
4-66-26-4
Semi-finals
Purcell M.
Vukic A.
7-637-66
Kozlov S.
Wolf J.[7]
2-66-37-5
Quarter-finals
Kozlov S.
Torpegaard M.
2-67-646-4
Vukic A.
Bolt A.[3]
7-56-4
Purcell M.
Mejia N.
6-43-66-0
Wolf J.[7]
Sandgren T.[1]
6-33-67-65
R16
Mejia N.
Kelly D.
6-40-66-2
Torpegaard M.
Gunneswaran P.[4]
6-16-4
Vukic A.
Kingsley C.
7-647-5
Purcell M.
Peniston R.
6-37-67
Kozlov S.
Kubler J.
6-27-5
Wolf J.[7]
King E.
6-36-0
Bolt A.[3]
Nam J.
7-656-4
Sandgren T.[1]
Brouwer G.
6-46-4
R32
Kelly D.
Caruso S.[2]
6-23-0
Bolt A.[3]
Rubin N.
7-657-64
Sandgren T.[1]
Galarneau A.
6-36-2
Gunneswaran P.[4]
Kovacevic A.
3-66-37-5
Vukic A.
Escobedo E.[6]
6-47-5
Kozlov S.
Krueger M.[8]
6-06-3
Brouwer G.
King D.
7-616-0
Mejia N.
Chappell N.
5-0
Wolf J.[7]
Mukund S.
6-36-2
Peniston R.
Jung J.[5]
6-36-4
Nam J.
Chung Y.
3-66-47-63
Torpegaard M.
Mochizuki S.
6-36-737-65
Kingsley C.
Vocel M.
5-76-17-63
Kubler J.
Polansky P.
7-666-4
King E.
Aragone J.
6-46-4