USA · ATP #271StefanKozlov
R-handed · 183 cm · Age 28
Hard Elo1587
Last 106-4
Last 6
WWWLWL
Surface rating
Elo by courtHard158797-78
Clay1624STRONGEST
Grass14344-7
Serve and return
25 matches since Apr 2026Hold, break and tiebreak ratesMeasured from his own matches. Open to Plus members.
Unlock1 day since his last match · W vs Shick · Charlottesville
Career
2020 to Nov 2026Matches21799 events entered
Won-lost118-9954.4% of matches
Titles3from 5 finals
Best of five1-325.0% at the Slams
By surface
Hard courts
97-78 · 55.4%
Clay courts
17-14 · 54.8%
Grass courts
4-7 · 36.4%
By opponent ranking
vs Top 10
0-3 · 0.0%
vs 11-20
0-1 · 0.0%
vs 21-50
1-2 · 33.3%
vs 51+
115-91 · 55.8%
How far he gets
Finals5
Semi-finals10
Quarter-finals17
Last 1636
Head to head
156 opponents · since 2020
Mitchell Krueger#361 · last met Oct 2026
3-3
J J Wolf#253 · last met Jul 2024
4-2
Steve Johnsonlast met Oct 2022
3-2
153 more head-to-headsEvery opponent since 2020, with the record against each.
UnlockRecent matches
Last 5Nov 6
ShickCharlottesville · QF
2-0WNov 4
CassoneCharlottesville · R16
2-0WNov 3
MartinCharlottesville · R32
2-0WOct 29
RehbergSioux Falls · R16
0-2LOct 27
CassoneSioux Falls · R32
1-1 ret.W15 more recent matchesScores and events for his last 20, by surface.
UnlockCareer, surface splits and recent matches count every result we hold since 2020: the match archive, then the results feeds. Serve, return and tiebreak rates count the last 52 weeks.