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SK Stefan Kozlov
US ATP · Rank #271

Stefan KozlovPredictions and form

28yrs 1.83 m 79 kg #103Career high Right
57.4%Hit rate
54
Matches tracked
Form guide
LWWWW
Just played, coming up Select a match to open its page
Challenger Knoxville USA Hard Challenger Knoxville USA (Hard) 3
23:10 Finished 2310
US S. Kozlov
US M. Zheng (2)
0 2
2.45 ▴1.53
2 ▴1.53
0626
2 ▴1.53
4.7
17:45 Finished 1745
US S. Kozlov
US B. Shick
2 0
▾1.4 ▴2.88
2 ▴2.88
643626
2 ▴2.88
2.7
22:20 Finished 2220
CA A. Galarneau
US S. Kozlov
0 2
▾2 ▴1.82
1 ▾2
466263
O19.5 1.44
2.1
Challenger Charlottesville USA Hard Challenger Charlottesville USA (Hard) 5
18:00 Finished 1800
US S. Kozlov
US A. Mayo (Q)
2 1
▴2.46 ▾1.53
2 ▾1.53
4646
O19.5 ▾1.41
3.8
20:35 Finished 2035
FR C. Chidekh (5)
US S. Kozlov
1 2
▴1.22 ▾4.4
1 ▴1.22
6364
1 ▴1.22
9.2
18:00 Finished 1800
US S. Kozlov
US B. Shick
2 0
▾1.54 ▴2.55
2 ▴2.55
466236
O19.5 ▴1.5
2.5
16:25 Finished 1625
US M. Cassone
US S. Kozlov
0 2
▾1.57 ▴2.38
1 ▾1.57
764663
1 ▾1.57
3.0
15:00 Finished 1500
US S. Kozlov
US A. Martin
2 0
▾1.84 ▴1.97
1 ▾1.84
466363
O19.5 ▴1.45
3.0
Challenger Sioux Falls USA Hard Challenger Sioux Falls USA (Hard) 1
17:35 Finished 1735
DE M. Rehberg
US S. Kozlov
2 0
▴1.54 ▾2.43
1 ▴1.54
624663
O19.5 ▾1.44
3.5
Challenger Columbus USA Hard Challenger Columbus USA (Hard) 2
18:55 Finished 1855
US S. Kozlov (8)
US M. Krueger
1 2
▾1.68 ▴2.12
1 ▾1.68
643663
O19.5 ▴1.45
4.0
22:05 Finished 2205
US S. Kozlov (8)
JP J. Trotter
2 0
▾1.93 ▴1.92
1 ▾1.93
6364
O19.5 1.34
2.5
Challenger San Diego 2 USA Hard Challenger San Diego 2 USA (Hard) 1
19:00 Finished 1900
US S. Kozlov
US C. Smith
0 2
▾2.75 ▴1.45
2 ▴1.45
366246
2 ▴1.45
3.5
Challenger Tiburon USA Hard Challenger Tiburon USA (Hard) 1
23:35 Finished 2335
US D. Blanch
US S. Kozlov
2 1
▴1.5 ▾2.65
1 ▴1.5
366364
1 ▴1.5
3.7
Challenger Brownsburg USA Hard Challenger Brownsburg USA (Hard) 1
15:00 Finished 1500
US S. Kozlov (A)
US A. Mayo
2 1
▴2.52 ▾1.54
2 ▾1.54
466236
2 ▾1.54
4.5
ATP Washington USA Qualifying Hard ATP Washington USA Qualifying (Hard) 1
16:15 Finished 1615
US Z. Svajda
US S. Kozlov
2 0
▴1.19 ▾4.55
1 ▴1.19
6364
1 ▴1.19
10
Challenger Bloomfield Hills USA Hard Challenger Bloomfield Hills USA (Hard) 3
17:05 Finished 1705
US S. Kozlov
MX A. Magadan
1 2
▴1.49 ▾2.7
1 ▴1.49
6376
1 ▴1.49
4.9
17:15 Finished 1715
US S. Kozlov (1)
ES R. Pascual (12)
0 2
▾1.4 ▴2.75
1 ▾1.4
6263
1 ▾1.4
5.0
17:50 Finished 1750
US S. Kozlov
JP L. Vithoontien
2 1
▾1.08 ▴7.5
1 ▾1.08
6263
1 ▾1.08
7.6
Challenger Pozoblanco Spain Hard Challenger Pozoblanco Spain (Hard) 1
18:20 Finished 1820
CN Y. Zhou
US S. Kozlov
2 1
▴1.61 ▾2.48
1 ▴1.61
6463
1 ▴1.61
3.8
Challenger Newport USA Grass Challenger Newport USA (Grass) 1
16:00 Finished 1600
US S. Kozlov
CN Y. Wu (5)
2 1
▾4 ▴1.23
2 ▴1.23
4667
O17.5 ▾1.36
6.9
Results by surface
Hard
25-20
Clay
6-5
Grass
3-0
Overall 34-25
BananaCore's calls for this player 31 of 54 right

Only matches we forecast are counted

Frequent opponents
Aidan Mayo 3 matches 3-0 Alan Magadan 3 matches 1-2 Alexis Galarneau 2 matches 2-0 Tyler Zink 2 matches 2-0 Raphael Perot 2 matches 2-0 Murphy Cassone 2 matches 2-0
More on Stefan Kozlov

World No. 271 Stefan Kozlov is 28 and plays right-handed. Career best: No. 103 in the world. No clear favourite surface: Hard 25-20, Clay 6-5, Grass 3-0. Too many free points go away on serve: 3.4 double faults a match, and the first delivery wins only 66.8%. A real threat on return: 28.5% of break points are converted.

In form: 4 of the last 5 finished matches won. No match in our data has lasted longer than the 33-game duel with A. Mayo. We have forecast this player's matches most often at Challenger Charlottesville USA: 5 of them. Open any of these matches for BananaCore's pick, a predicted scoreline and the serve and return figures behind them. Latest tournament on record: Challenger Knoxville USA. Whenever Stefan Kozlov is on court, the match also appears among today's tennis predictions, next to every other match of the day.

Serving and returning
1st serves in
59.3%
Won on 1st serve
67.6%
Won on 2nd serve
54.2%
Aces per match
2.3
Double faults per match
2.7
Break points saved
67.5%
Return games won
35%
Points won on return
43.8%
Service points won
62.1%
All points won
52.8%
Career Past 12 months
1
Titles
1
Finals
1
Semi-final runs
26
Tournaments played
Results by tournament 1 title
Champaign, USA Challenger Winner Bogota (Los Lagartos), Colombia Challenger Quarter-Finals Cleveland, USA Challenger Quarter-Finals Metepec, Mexico Challenger Quarter-Finals Nottingham, Great Britain Challenger Quarter-Finals Brownsburg, USA Challenger Round of 16 Colombus, USA Men Singles Challenger Round of 16 Mexico City, Mexico Challenger Round of 16 Morelos, Mexico Challenger Round of 16 Newport, USA Challenger Round of 16 Oeiras, Portugal Challenger Round of 16 Savannah, USA Challenger Round of 16 Sioux Falls, USA Challenger Round of 16 Tiburon, USA Challenger Round of 32 Bloomfield Hills, USA Challenger Round of 32 Glasgow, Great Britain Challenger Round of 32 Morelia, Mexico Challenger Round of 32 Phoenix, USA Challenger Round of 32 Pozoblanco, Spain Challenger Round of 32 San Diego 2, USA, Challenger Round of 32 San Diego, USA Challenger Round of 32 San Luis, Mexico Challenger Round of 32 Tallahassee, USA Challenger Round of 32
Valencia, Spain Challenger Qualifying
Acapulco ATP Qualifying Washington ATP Qualifying

Sorted by best result, not by date

Year by year

2026in progress

27–23
W–L
50
Matches
5–8
Tiebreaks
2.7
Aces per match
3.6
Double faults per match
1st serves in 60.1%
Won on 1st serve 66.9%
Won on 2nd serve 49.5%
Break points converted 40.8%
Break points saved 56.7%

2025

20–9
W–L
29
Matches
2–3
Tiebreaks
1.6
Aces per match
1.4
Double faults per match
1st serves in 67.5%
Won on 1st serve 60.4%
Won on 2nd serve 47.1%
Break points converted 51.6%
Break points saved 59.2%

2024

37–19
W–L
56
Matches
11–5
Tiebreaks
1.9
Aces per match
4.3
Double faults per match
1st serves in 65.4%
Won on 1st serve 65.6%
Won on 2nd serve 48.9%
Break points converted 44.3%
Break points saved 60.1%

2023

0–1
W–L
1
Matches
—
Tiebreaks
0
Aces per match
0
Double faults per match
1st serves in 74.6%
Won on 1st serve 60%
Won on 2nd serve 35.3%
Break points converted 100%
Break points saved 69.2%

Official singles figures for this season, as published by the tour. Don't expect the wins and losses to match our Predictions tab: that record covers only the matches we forecast. A dash marks a figure with no data yet.

Common questions

How often do our calls on Stefan Kozlov come true?

+

31 of our 54 graded predictions on Stefan Kozlov's matches were right, 57.4%. The latest 20 are listed below, each pick next to its result.

Which opponent has Stefan Kozlov met most in our records?

+

Aidan Mayo, 3 times, with Stefan Kozlov at 3-0 in those matches.