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Stefan Kozlov Stats, Ranking & Age
Stefan Kozlov - USA
56 Average Form
L
W
L
L
W
W
ATP Rank
404
Elo Score
118
Singles - Career
Age
W-L
Career Winnings
Height
Weight
Hand
27
265 - 231
$1,024,083
1.83m
79kg
Right-handed
Stefan Kozlov is recently performing at a average level. Stefan Kozlov's record in 2025 is 5 wins to 4 losses. Their career record is 265 wins to 231 losses.
Stats
Matches & Results
Surface : All
2025 Stats
All Surfaces
Hard
Clay
Grass
General Overview Stats (All Surfaces)
Performance
Profile
Data Point
Total
Details
Percentile
Prize Money
Career Total
Career Total
$1,024,083USD Earned
$2,065Earned Per Match
80
Current Ranking
ATP - Men
ATP - Men
404Since Jul 2024
118Elo Points
81
Win Percentage
2025 Year
2025 Year
55.6%5 / 9 Matches
AverageAverage Form
73
Win Percentage
Trailing 12 Months
Trailing 12 Months
64.8%35 / 54 Matches
AverageAverage Form
91
Win Percentage
Career Total
Career Total
53.4%265 / 496 Matches
AverageAverage Form
79
On the Court This Year
Aces
2025
2025
1.89Aces Per Match
Bad17 / 9 matches
32
First Serve
2025
2025
60.2%First Serve
Below AverageSuccess Rate
45
Double Faults
2025
2025
2.44Per Match
Good22 / 9 matches
70
Break Points Won
2025
2025
43.4%BP Converted
Average3.56 Breaks
56
Stefan Kozlov is ranked 404 in the ATP rankings with an ELO score of 118. In 2025, Stefan Kozlov is in Average form, achieving 55.6% wins. Stefan Kozlov hits 60.2% on first serves, averaging 1.89 aces per match and maintains a double fault ratio of 2.44. Stefan Kozlov converts 43.4% of their break points.
Data Point
Stat
Age
27
Forehand
Right-handed
Backhand
Two-handed
Birthday
February 1, 1998
Turned Pro
2013
Height
1.83m
Weight
79kg
Win Percentage (Match / Set)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Match Wins
56%
65%
78
Match Wins (3 Sets)
56%
65%
77
Match Wins (5 Sets)
N/A
N/A
N/A
Wins in Straight Sets
33%
37%
60
Wins From Behind
33%
27%
95
Won At Least 1 Set
56%
76%
44
Set 1 Win
33%
59%
29
Set 2 Win
56%
54%
77
Set 3 Win
100%
71%
92
Set 4 Win
N/A
N/A
0
Set 5 Win
N/A
N/A
0
Data Point
Percentage
Number
Percentile
Match Wins
53%
265 / 496
78
Match Wins (3 Sets)
56%
253 / 455
84
Match Wins (5 Sets)
29%
12 / 41
27
Wins in Straight Sets
33%
163 / 496
65
Wins From Behind
18%
50 times
83
Won At Least 1 Set
67%
333 / 496
68
Set 1 Win
50%
249 / 496
64
Set 2 Win
49%
245 / 495
63
Set 3 Win
61%
104 / 170
90
Set 4 Win
50%
1 / 2
56
Set 5 Win
0%
0 / 1
0
Aces Stats (3 Set Matches Only)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Aces Per Match
1.89
1.87
32
Most Aces in a match
22%
24%
13
Over 0.5 Aces
67%
70%
16
Over 1.5 Aces
33%
43%
8
Over 2.5 Aces
33%
26%
20
Over 3.5 Aces
22%
17%
21
Over 4.5 Aces
22%
13%
31
Over 5.5 Aces
11%
11%
19
Over 6.5 Aces
0%
7%
0
Over 7.5 Aces
0%
0%
0
Over 8.5 Aces
0%
0%
0
Over 9.5 Aces
0%
0%
0
Over 14.5 Aces
0%
0%
0
Stefan Kozlov has an average of 1.89 aces per match in 2025. Stefan Kozlov recorded Over 0.5 aces in 67% of their matches, Over 1.5 aces in 33%, and Over 2.5 aces in 33%.
For the higher aces count, Stefan Kozlov recorded Over 3.5 aces in 22% of their matches, Over 4.5 aces in 22%, Over 5.5 aces in 11%, and Over 6.5 aces in 0%. Overall, Stefan Kozlov is better than 32% of the players in terms of Aces Per Match during their latest matches.
Data Point
Percentage
Number
Percentile
Aces Per Match
2.66
461 / 173
44
Over 0.5 Aces
82%
142 / 173
41
Over 1.5 Aces
62%
107 / 173
39
Over 2.5 Aces
40%
70 / 173
29
Over 3.5 Aces
29%
50 / 173
29
Over 4.5 Aces
19%
33 / 173
24
Over 5.5 Aces
14%
25 / 173
27
Over 6.5 Aces
9%
16 / 173
24
Over 7.5 Aces
4%
7 / 173
11
Over 8.5 Aces
2%
3 / 173
7
Over 9.5 Aces
1%
2 / 173
3
Over 14.5 Aces
0%
0 / 173
0
Match Total Games Stats
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Average Total Games (3 Set Matches)
20
21.93
33
Average Total Games (5 Set Matches)
N/A
N/A
0
Over 12.5
100%
98%
41
Over 13.5
100%
96%
56
Over 14.5
100%
94%
71
Over 15.5
89%
87%
62
Over 16.5
78%
80%
52
Over 17.5
56%
67%
23
Over 18.5
44%
63%
17
Over 19.5
33%
57%
11
Over 20.5
33%
52%
18
Over 21.5
22%
46%
8
Over 22.5
22%
44%
13
Over 23.5
22%
39%
19
Over 24.5
22%
37%
24
Over 25.5
22%
30%
34
Over 26.5
22%
24%
48
Over 27.5
22%
24%
62
Over 28.5
11%
15%
21
Over 29.5
0%
11%
0
Over 30.5
0%
7%
0
Data Point
Percentage
Percentile
Average Total Games (3 Set Matches)
21.6
53
Over 12.5
98%
44
Over 13.5
96%
41
Over 14.5
94%
53
Over 15.5
89%
55
Over 16.5
82%
56
Over 17.5
73%
56
Over 18.5
65%
59
Over 19.5
57%
61
Over 20.5
49%
57
Over 21.5
42%
50
Over 22.5
38%
59
Over 23.5
31%
45
Over 24.5
30%
49
Over 25.5
26%
45
Over 26.5
23%
49
Over 27.5
20%
48
Over 28.5
15%
37
Over 29.5
11%
30
Over 30.5
9%
36
Break of Serve (Break Points Won) - Over/Under
2025 & Last 12
Career
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Last 12
Percentile
Breaks Per Match
3.56
3.37
72
Over 0.5
100%
91%
63
Over 1.5
78%
85%
57
Over 2.5
56%
74%
46
Over 3.5
44%
59%
51
Over 4.5
33%
33%
58
Over 5.5
11%
17%
36
Over 6.5
11%
6%
61
In 2025, Stefan Kozlov has an average of 3.56 break points won per match in best of 3 set matches. Stefan Kozlov has recorded Over 0.5 breaks of serve in 100% of their matches, Over 1.5 breaks of serve in 78%, and Over 2.5 breaks of serve in 56%. For higher break counts, Stefan Kozlov has achieved Over 3.5 breaks in 44% of their matches and Over 4.5 breaks in 33%. For Stefan Kozlov’s Over 5.5 break points won, the rate is 11%.
Data Point
2025
Last 12
Percentile
Breaks Per Match
N/A
N/A
0
Over 0.5
N/A
N/A
0
Over 1.5
N/A
N/A
0
Over 2.5
N/A
N/A
0
Over 3.5
N/A
N/A
0
Over 4.5
N/A
N/A
0
Over 5.5
N/A
N/A
0
Over 6.5
N/A
N/A
0
Over 7.5
N/A
N/A
0
Over 8.5
N/A
N/A
0
Data Point
2025
Last 12
Percentile
Average Break-Points Converted (Set 1)
1.44
1.45
57
Average Break-Points Converted (Set 2)
1.67
1.43
76
Average Break-Points Converted (Set 3)
2
1.26
86
will Break Serve %
48%
45%
69
will not Break Serve %
52%
39%
69
Over 0.5
67%
72%
38
Over 1.5
33%
57%
25
Over 2.5
11%
30%
27
Breaks Per Set data uses Set 1 as a sample.
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Number
Percentile
Breaks Per Match
3.23
N/A
84
Over 0.5
91%
158 / 173
76
Over 1.5
80%
139 / 173
86
Over 2.5
68%
118 / 173
91
Over 3.5
48%
83 / 173
86
Over 4.5
28%
48 / 173
82
Over 5.5
13%
23 / 173
77
Over 6.5
3%
6 / 173
55
Data Point
2025
Number
Percentile
Breaks Per Match
3.47
N/A
88
Over 0.5
100%
17 / 17
73
Over 1.5
65%
11 / 17
41
Over 2.5
47%
8 / 17
39
Over 3.5
18%
3 / 17
11
Over 4.5
12%
2 / 17
22
Over 5.5
12%
2 / 17
62
Over 6.5
6%
1 / 17
54
Over 7.5
0%
0 / 17
0
Over 8.5
0%
0 / 17
96
Data Point
2025
Number
Percentile
Average Break-Points Converted (Set 1)
1.15
N/A
57
Average Break-Points Converted (Set 2)
1.38
N/A
71
Average Break-Points Converted (Set 3)
1.29
N/A
64
will Break Serve %
35%
N/A
49
will not Break Serve %
34%
N/A
30
Over 0.5
61%
125 / 206
49
Over 1.5
40%
83 / 206
70
Over 2.5
17%
36 / 206
78
Breaks Per Set data uses Set 1 as a sample.
Double Faults - Over/Under
2025 & Last 12 Months
Career
3 Set Matches
5 Set Matches
Data Point
2025
Last 12
Percentile
Double Faults Per Match
2.44
4.04
70
Over 0.5 (1+)
89%
94%
73
Over 1.5 (2+)
67%
85%
72
Over 2.5 (3+)
22%
61%
97
Over 3.5 (4+)
22%
46%
84
Over 4.5 (5+)
11%
31%
87
Over 5.5 (6+)
11%
26%
72
Over 6.5 (7+)
11%
20%
57
Over 7.5 (8+)
11%
15%
48
In their recent matches, Stefan Kozlov averaged 2.44 double faults per match in best of 3 set matches. Stefan Kozlov has recorded Over 0.5 double faults in 89% of their matches and Over 1.5 double faults in 67%. For the higher double fault counts, Stefan Kozlov has recorded Over 2.5 double faults in 22% of their recent matches, Over 3.5 double faults in 22% of those, Over 4.5 double faults in 11%, and Over 5.5 double faults in 11%
Data Point
2025
Last 12
Percentile
Double Faults Per Match
N/A
N/A
100
Over 0.5 (1+)
N/A
N/A
100
Over 1.5 (2+)
N/A
N/A
100
Over 2.5 (3+)
N/A
N/A
100
Over 3.5 (4+)
N/A
N/A
100
Over 4.5 (5+)
N/A
N/A
100
Over 5.5 (6+)
N/A
N/A
100
Over 6.5 (7+)
N/A
N/A
100
Over 7.5 (8+)
N/A
N/A
100
Over 8.5 (9+)
N/A
N/A
100
Over 9.5 (10+)
N/A
N/A
100
Over 10.5 (11+)
N/A
N/A
100
3 Set Matches
5 Set Matches
Data Point
2025
Number
Percentile
Double Faults Per Match
4.06
702 / 173
18
Over 0.5 (1+)
96%
166 / 173
34
Over 1.5 (2+)
84%
146 / 173
29
Over 2.5 (3+)
69%
119 / 173
26
Over 3.5 (4+)
50%
87 / 173
32
Over 4.5 (5+)
39%
68 / 173
24
Over 5.5 (6+)
27%
46 / 173
23
Over 6.5 (7+)
16%
28 / 173
29
Over 7.5 (8+)
11%
19 / 173
29
Data Point
2025
Number
Percentile
Double Faults Per Match
5.65
96 / 17
5
Over 0.5 (1+)
100%
17 / 17
33
Over 1.5 (2+)
100%
17 / 17
19
Over 2.5 (3+)
88%
15 / 17
14
Over 3.5 (4+)
65%
11 / 17
16
Over 4.5 (5+)
65%
11 / 17
8
Over 5.5 (6+)
53%
9 / 17
6
Over 6.5 (7+)
41%
7 / 17
7
Over 7.5 (8+)
18%
3 / 17
16
Over 8.5 (9+)
12%
2 / 17
17
Over 9.5 (10+)
12%
2 / 17
12
Over 10.5 (11+)
6%
1 / 17
23
Win Percentage (Hard Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Match Wins
56%
62%
78
Match Wins (3 Sets)
56%
62%
77
Match Wins (5 Sets)
N/A
N/A
N/A
Wins in Straight Sets
33%
41%
60
Wins From Behind
33%
27%
95
Won At Least 1 Set
56%
76%
44
Set 1 Win
33%
59%
29
Set 2 Win
56%
59%
77
Set 3 Win
100%
60%
92
Set 4 Win
N/A
N/A
0
Set 5 Win
N/A
N/A
0
Data Point
Percentage
Number
Percentile
Match Wins
57%
191 / 337
78
Match Wins (3 Sets)
57%
191 / 337
84
Match Wins (5 Sets)
26%
7 / 27
27
Wins in Straight Sets
37%
123 / 337
65
Wins From Behind
20%
36 times
83
Won At Least 1 Set
70%
236 / 337
68
Set 1 Win
53%
179 / 337
64
Set 2 Win
53%
179 / 336
63
Set 3 Win
62%
68 / 110
90
Set 4 Win
0%
0 / 1
56
Set 5 Win
N/A
0 / 0
0
Aces (Hard Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Aces Per Match
1.89
1.93
24
Most Aces in a match
22%
21%
12
Over 0.5 Aces
67%
79%
11
Over 1.5 Aces
33%
48%
4
Over 2.5 Aces
33%
28%
12
Over 3.5 Aces
22%
17%
13
Over 4.5 Aces
22%
10%
20
Over 5.5 Aces
11%
7%
10
Over 6.5 Aces
0%
3%
0
Over 7.5 Aces
0%
0%
0
Over 8.5 Aces
0%
0%
0
Over 9.5 Aces
0%
0%
0
Over 14.5 Aces
0%
0%
0
Data Point
Percentage
Number
Percentile
Aces Per Match
2.92
397 / 136
34
Over 0.5 Aces
87%
118 / 136
35
Over 1.5 Aces
68%
92 / 136
32
Over 2.5 Aces
46%
62 / 136
22
Over 3.5 Aces
32%
44 / 136
19
Over 4.5 Aces
21%
29 / 136
17
Over 5.5 Aces
15%
21 / 136
16
Over 6.5 Aces
10%
13 / 136
14
Over 7.5 Aces
5%
7 / 136
5
Over 8.5 Aces
2%
3 / 136
1
Over 9.5 Aces
1%
2 / 136
0
Over 14.5 Aces
0%
0 / 136
0
Match Total Games (Hard Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Average Total Games (3 Set Matches)
20
21.14
34
Average Total Games (5 Set Matches)
N/A
N/A
0
Over 12.5
100%
98%
41
Over 13.5
100%
96%
56
Over 14.5
100%
94%
71
Over 15.5
89%
87%
62
Over 16.5
78%
80%
52
Over 17.5
56%
67%
23
Over 18.5
44%
63%
17
Over 19.5
33%
57%
11
Over 20.5
33%
52%
18
Over 21.5
22%
46%
8
Over 22.5
22%
44%
13
Over 23.5
22%
39%
19
Over 24.5
22%
37%
24
Over 25.5
22%
30%
34
Over 26.5
22%
24%
48
Over 27.5
22%
24%
62
Over 28.5
11%
15%
21
Over 29.5
0%
11%
0
Over 30.5
0%
7%
0
Data Point
Percentage
Percentile
Average Total Games (3 Set Matches)
21.51
47
Over 12.5
98%
44
Over 13.5
96%
41
Over 14.5
94%
53
Over 15.5
89%
55
Over 16.5
82%
56
Over 17.5
73%
56
Over 18.5
65%
59
Over 19.5
57%
61
Over 20.5
49%
57
Over 21.5
42%
50
Over 22.5
38%
59
Over 23.5
31%
45
Over 24.5
30%
49
Over 25.5
26%
45
Over 26.5
23%
49
Over 27.5
20%
48
Over 28.5
15%
37
Over 29.5
11%
30
Over 30.5
9%
36
Break Points Won (Hard Courts)
2025 & Last 12
Career
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Last 12
Percentile
Breaks Per Match
3.56
3.24
77
Over 0.5
100%
93%
61
Over 1.5
78%
86%
59
Over 2.5
56%
72%
50
Over 3.5
44%
55%
57
Over 4.5
33%
28%
60
Over 5.5
11%
7%
36
Over 6.5
11%
3%
49
Data Point
2025
Last 12
Percentile
Breaks Per Match
N/A
N/A
0
Over 0.5
N/A
N/A
0
Over 1.5
N/A
N/A
0
Over 2.5
N/A
N/A
0
Over 3.5
N/A
N/A
0
Over 4.5
N/A
N/A
0
Over 5.5
N/A
N/A
0
Over 6.5
N/A
N/A
0
Over 7.5
N/A
N/A
0
Over 8.5
N/A
N/A
0
Data Point
2025
Last 12
Percentile
Average Break-Points Converted (Set 1)
1.44
1.31
64
Average Break-Points Converted (Set 2)
1.67
1.47
81
Average Break-Points Converted (Set 3)
2
1.35
88
will Break Serve %
48%
42%
69
will not Break Serve %
52%
38%
71
Over 0.5
67%
66%
44
Over 1.5
33%
48%
29
Over 2.5
11%
28%
28
Breaks Per Set data uses Set 1 as a sample.
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Number
Percentile
Breaks Per Match
3.24
N/A
89
Over 0.5
95%
129 / 136
78
Over 1.5
85%
116 / 136
89
Over 2.5
72%
98 / 136
93
Over 3.5
49%
66 / 136
88
Over 4.5
27%
37 / 136
86
Over 5.5
12%
16 / 136
80
Over 6.5
3%
4 / 136
57
Data Point
2025
Number
Percentile
Breaks Per Match
3.58
N/A
90
Over 0.5
100%
12 / 12
67
Over 1.5
58%
7 / 12
27
Over 2.5
42%
5 / 12
31
Over 3.5
25%
3 / 12
23
Over 4.5
17%
2 / 12
37
Over 5.5
17%
2 / 12
77
Over 6.5
8%
1 / 12
64
Over 7.5
0%
0 / 12
0
Over 8.5
0%
0 / 12
91
Data Point
2025
Number
Percentile
Average Break-Points Converted (Set 1)
1.22
N/A
74
Average Break-Points Converted (Set 2)
1.38
N/A
80
Average Break-Points Converted (Set 3)
1.31
N/A
72
will Break Serve %
38%
N/A
64
will not Break Serve %
35%
N/A
39
Over 0.5
67%
100 / 150
68
Over 1.5
43%
65 / 150
82
Over 2.5
19%
28 / 150
85
Breaks Per Set data uses Set 1 as a sample.
Double Faults (Hard Courts)
2025 & Last 12 Months
Career
3 Set Matches
5 Set Matches
Data Point
2025
Last 12
Percentile
Double Faults Per Match
2.44
3.03
68
Over 0.5 (1+)
89%
90%
72
Over 1.5 (2+)
67%
79%
70
Over 2.5 (3+)
22%
45%
96
Over 3.5 (4+)
22%
31%
83
Over 4.5 (5+)
11%
17%
89
Over 5.5 (6+)
11%
14%
75
Over 6.5 (7+)
11%
14%
63
Over 7.5 (8+)
11%
10%
58
Data Point
2025
Last 12
Percentile
Double Faults Per Match
N/A
N/A
100
Over 0.5 (1+)
N/A
N/A
100
Over 1.5 (2+)
N/A
N/A
100
Over 2.5 (3+)
N/A
N/A
100
Over 3.5 (4+)
N/A
N/A
100
Over 4.5 (5+)
N/A
N/A
100
Over 5.5 (6+)
N/A
N/A
100
Over 6.5 (7+)
N/A
N/A
100
Over 7.5 (8+)
N/A
N/A
100
Over 8.5 (9+)
N/A
N/A
100
Over 9.5 (10+)
N/A
N/A
100
Over 10.5 (11+)
N/A
N/A
100
3 Set Matches
5 Set Matches
Data Point
2025
Number
Percentile
Double Faults Per Match
3.73
507 / 136
24
Over 0.5 (1+)
95%
129 / 136
39
Over 1.5 (2+)
82%
112 / 136
34
Over 2.5 (3+)
65%
88 / 136
33
Over 3.5 (4+)
45%
61 / 136
37
Over 4.5 (5+)
35%
48 / 136
30
Over 5.5 (6+)
24%
32 / 136
32
Over 6.5 (7+)
13%
17 / 136
36
Over 7.5 (8+)
8%
11 / 136
37
Data Point
2025
Number
Percentile
Double Faults Per Match
4.92
59 / 12
12
Over 0.5 (1+)
100%
12 / 12
38
Over 1.5 (2+)
100%
12 / 12
22
Over 2.5 (3+)
92%
11 / 12
14
Over 3.5 (4+)
58%
7 / 12
23
Over 4.5 (5+)
58%
7 / 12
11
Over 5.5 (6+)
42%
5 / 12
15
Over 6.5 (7+)
33%
4 / 12
15
Over 7.5 (8+)
8%
1 / 12
58
Over 8.5 (9+)
0%
0 / 12
100
Over 9.5 (10+)
0%
0 / 12
100
Over 10.5 (11+)
0%
0 / 12
100
Win Percentage (Clay Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Match Wins
N/A
68%
0
Match Wins (3 Sets)
N/A
68%
0
Match Wins (5 Sets)
N/A
N/A
N/A
Wins in Straight Sets
N/A
32%
0
Wins From Behind
N/A
27%
0
Won At Least 1 Set
N/A
76%
0
Set 1 Win
N/A
60%
0
Set 2 Win
N/A
48%
0
Set 3 Win
N/A
82%
0
Set 4 Win
N/A
N/A
0
Set 5 Win
N/A
N/A
0
Data Point
Percentage
Number
Percentile
Match Wins
56%
53 / 95
78
Match Wins (3 Sets)
56%
53 / 95
84
Match Wins (5 Sets)
20%
1 / 5
27
Wins in Straight Sets
33%
31 / 95
65
Wins From Behind
18%
9 times
83
Won At Least 1 Set
67%
64 / 95
68
Set 1 Win
52%
49 / 95
64
Set 2 Win
48%
46 / 95
63
Set 3 Win
67%
22 / 33
90
Set 4 Win
N/A
0 / 0
56
Set 5 Win
N/A
0 / 0
0
Aces (Clay Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Aces Per Match
N/A
1.8
0
Most Aces in a match
N/A
28%
0
Over 0.5 Aces
N/A
60%
0
Over 1.5 Aces
N/A
36%
0
Over 2.5 Aces
N/A
24%
0
Over 3.5 Aces
N/A
16%
0
Over 4.5 Aces
N/A
16%
0
Over 5.5 Aces
N/A
16%
0
Over 6.5 Aces
N/A
12%
0
Over 7.5 Aces
N/A
0%
0
Over 8.5 Aces
N/A
0%
0
Over 9.5 Aces
N/A
0%
0
Over 14.5 Aces
N/A
0%
0
Data Point
Percentage
Number
Percentile
Aces Per Match
1.74
54 / 31
32
Over 0.5 Aces
65%
20 / 31
23
Over 1.5 Aces
42%
13 / 31
23
Over 2.5 Aces
19%
6 / 31
11
Over 3.5 Aces
13%
4 / 31
13
Over 4.5 Aces
13%
4 / 31
23
Over 5.5 Aces
13%
4 / 31
36
Over 6.5 Aces
10%
3 / 31
38
Over 7.5 Aces
0%
0 / 31
0
Over 8.5 Aces
0%
0 / 31
0
Over 9.5 Aces
0%
0 / 31
0
Over 14.5 Aces
0%
0 / 31
0
Match Total Games (Clay Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Average Total Games (3 Set Matches)
N/A
22.84
0
Average Total Games (5 Set Matches)
N/A
N/A
0
Over 12.5
100%
98%
41
Over 13.5
100%
96%
56
Over 14.5
100%
94%
71
Over 15.5
89%
87%
62
Over 16.5
78%
80%
52
Over 17.5
56%
67%
23
Over 18.5
44%
63%
17
Over 19.5
33%
57%
11
Over 20.5
33%
52%
18
Over 21.5
22%
46%
8
Over 22.5
22%
44%
13
Over 23.5
22%
39%
19
Over 24.5
22%
37%
24
Over 25.5
22%
30%
34
Over 26.5
22%
24%
48
Over 27.5
22%
24%
62
Over 28.5
11%
15%
21
Over 29.5
0%
11%
0
Over 30.5
0%
7%
0
Data Point
Percentage
Percentile
Average Total Games (3 Set Matches)
22.11
74
Over 12.5
98%
44
Over 13.5
96%
41
Over 14.5
94%
53
Over 15.5
89%
55
Over 16.5
82%
56
Over 17.5
73%
56
Over 18.5
65%
59
Over 19.5
57%
61
Over 20.5
49%
57
Over 21.5
42%
50
Over 22.5
38%
59
Over 23.5
31%
45
Over 24.5
30%
49
Over 25.5
26%
45
Over 26.5
23%
49
Over 27.5
20%
48
Over 28.5
15%
37
Over 29.5
11%
30
Over 30.5
9%
36
Break Points Won (Clay Courts)
2025 & Last 12
Career
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Last 12
Percentile
Breaks Per Match
N/A
3.52
0
Over 0.5
N/A
88%
0
Over 1.5
N/A
84%
0
Over 2.5
N/A
76%
0
Over 3.5
N/A
64%
0
Over 4.5
N/A
40%
0
Over 5.5
N/A
28%
0
Over 6.5
N/A
8%
0
Data Point
2025
Last 12
Percentile
Breaks Per Match
N/A
N/A
0
Over 0.5
N/A
N/A
0
Over 1.5
N/A
N/A
0
Over 2.5
N/A
N/A
0
Over 3.5
N/A
N/A
0
Over 4.5
N/A
N/A
0
Over 5.5
N/A
N/A
0
Over 6.5
N/A
N/A
0
Over 7.5
N/A
N/A
0
Over 8.5
N/A
N/A
0
Data Point
2025
Last 12
Percentile
Average Break-Points Converted (Set 1)
N/A
1.62
0
Average Break-Points Converted (Set 2)
N/A
1.38
0
Average Break-Points Converted (Set 3)
N/A
1.18
0
will Break Serve %
N/A
50%
0
will not Break Serve %
N/A
41%
0
Over 0.5
N/A
80%
0
Over 1.5
N/A
68%
0
Over 2.5
N/A
32%
0
Breaks Per Set data uses Set 1 as a sample.
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Number
Percentile
Breaks Per Match
3.39
N/A
81
Over 0.5
81%
25 / 31
40
Over 1.5
71%
22 / 31
54
Over 2.5
65%
20 / 31
74
Over 3.5
55%
17 / 31
89
Over 4.5
35%
11 / 31
86
Over 5.5
23%
7 / 31
89
Over 6.5
6%
2 / 31
70
Data Point
2025
Number
Percentile
Breaks Per Match
3
N/A
48
Over 0.5
100%
1 / 1
65
Over 1.5
0%
0 / 1
0
Over 2.5
0%
0 / 1
0
Over 3.5
0%
0 / 1
0
Over 4.5
0%
0 / 1
0
Over 5.5
0%
0 / 1
0
Over 6.5
0%
0 / 1
0
Over 7.5
0%
0 / 1
0
Over 8.5
0%
0 / 1
0
Data Point
2025
Number
Percentile
Average Break-Points Converted (Set 1)
1.12
N/A
40
Average Break-Points Converted (Set 2)
1.45
N/A
67
Average Break-Points Converted (Set 3)
1.18
N/A
36
will Break Serve %
32%
N/A
33
will not Break Serve %
33%
N/A
22
Over 0.5
50%
21 / 42
18
Over 1.5
43%
18 / 42
64
Over 2.5
19%
8 / 42
73
Breaks Per Set data uses Set 1 as a sample.
Double Faults (Clay Courts)
2025 & Last 12 Months
Career
3 Set Matches
5 Set Matches
Data Point
2025
Last 12
Percentile
Double Faults Per Match
N/A
5.2
100
Over 0.5 (1+)
N/A
100%
100
Over 1.5 (2+)
N/A
92%
100
Over 2.5 (3+)
N/A
80%
100
Over 3.5 (4+)
N/A
64%
100
Over 4.5 (5+)
N/A
48%
100
Over 5.5 (6+)
N/A
40%
100
Over 6.5 (7+)
N/A
28%
100
Over 7.5 (8+)
N/A
20%
100
Data Point
2025
Last 12
Percentile
Double Faults Per Match
N/A
N/A
100
Over 0.5 (1+)
N/A
N/A
100
Over 1.5 (2+)
N/A
N/A
100
Over 2.5 (3+)
N/A
N/A
100
Over 3.5 (4+)
N/A
N/A
100
Over 4.5 (5+)
N/A
N/A
100
Over 5.5 (6+)
N/A
N/A
100
Over 6.5 (7+)
N/A
N/A
100
Over 7.5 (8+)
N/A
N/A
100
Over 8.5 (9+)
N/A
N/A
100
Over 9.5 (10+)
N/A
N/A
100
Over 10.5 (11+)
N/A
N/A
100
3 Set Matches
5 Set Matches
Data Point
2025
Number
Percentile
Double Faults Per Match
5.13
159 / 31
8
Over 0.5 (1+)
100%
31 / 31
38
Over 1.5 (2+)
90%
28 / 31
29
Over 2.5 (3+)
81%
25 / 31
21
Over 3.5 (4+)
68%
21 / 31
17
Over 4.5 (5+)
52%
16 / 31
15
Over 5.5 (6+)
35%
11 / 31
19
Over 6.5 (7+)
26%
8 / 31
20
Over 7.5 (8+)
19%
6 / 31
20
Data Point
2025
Number
Percentile
Double Faults Per Match
7
7 / 1
2
Over 0.5 (1+)
100%
1 / 1
45
Over 1.5 (2+)
100%
1 / 1
26
Over 2.5 (3+)
100%
1 / 1
14
Over 3.5 (4+)
100%
1 / 1
10
Over 4.5 (5+)
100%
1 / 1
7
Over 5.5 (6+)
100%
1 / 1
3
Over 6.5 (7+)
100%
1 / 1
1
Over 7.5 (8+)
0%
0 / 1
100
Over 8.5 (9+)
0%
0 / 1
100
Over 9.5 (10+)
0%
0 / 1
100
Over 10.5 (11+)
0%
0 / 1
100
Win Percentage (Grass Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Match Wins
N/A
N/A
0
Match Wins (3 Sets)
N/A
N/A
0
Match Wins (5 Sets)
N/A
N/A
N/A
Wins in Straight Sets
N/A
N/A
0
Wins From Behind
N/A
N/A
0
Won At Least 1 Set
N/A
N/A
0
Set 1 Win
N/A
N/A
0
Set 2 Win
N/A
N/A
0
Set 3 Win
N/A
N/A
0
Set 4 Win
N/A
N/A
0
Set 5 Win
N/A
N/A
0
Data Point
Percentage
Number
Percentile
Match Wins
39%
9 / 23
78
Match Wins (3 Sets)
39%
9 / 23
84
Match Wins (5 Sets)
44%
4 / 9
27
Wins in Straight Sets
22%
5 / 23
65
Wins From Behind
13%
2 times
83
Won At Least 1 Set
48%
11 / 23
68
Set 1 Win
30%
7 / 23
64
Set 2 Win
39%
9 / 23
63
Set 3 Win
67%
4 / 6
90
Set 4 Win
100%
1 / 1
56
Set 5 Win
0%
0 / 1
0
Aces (Grass Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Aces Per Match
N/A
N/A
0
Most Aces in a match
N/A
N/A
0
Over 0.5 Aces
N/A
N/A
0
Over 1.5 Aces
N/A
N/A
0
Over 2.5 Aces
N/A
N/A
0
Over 3.5 Aces
N/A
N/A
0
Over 4.5 Aces
N/A
N/A
0
Over 5.5 Aces
N/A
N/A
0
Over 6.5 Aces
N/A
N/A
0
Over 7.5 Aces
N/A
N/A
0
Over 8.5 Aces
N/A
N/A
0
Over 9.5 Aces
N/A
N/A
0
Over 14.5 Aces
N/A
N/A
0
Data Point
Percentage
Number
Percentile
Aces Per Match
1.67
10 / 6
4
Over 0.5 Aces
67%
4 / 6
3
Over 1.5 Aces
33%
2 / 6
0
Over 2.5 Aces
33%
2 / 6
2
Over 3.5 Aces
33%
2 / 6
3
Over 4.5 Aces
0%
0 / 6
0
Over 5.5 Aces
0%
0 / 6
0
Over 6.5 Aces
0%
0 / 6
0
Over 7.5 Aces
0%
0 / 6
0
Over 8.5 Aces
0%
0 / 6
0
Over 9.5 Aces
0%
0 / 6
0
Over 14.5 Aces
0%
0 / 6
0
Match Total Games (Grass Courts)
2025 & Last 12 Months
Career
Data Point
2025
Last 12 Months
Percentile
Average Total Games (3 Set Matches)
N/A
N/A
0
Average Total Games (5 Set Matches)
N/A
N/A
0
Over 12.5
100%
98%
41
Over 13.5
100%
96%
56
Over 14.5
100%
94%
71
Over 15.5
89%
87%
62
Over 16.5
78%
80%
52
Over 17.5
56%
67%
23
Over 18.5
44%
63%
17
Over 19.5
33%
57%
11
Over 20.5
33%
52%
18
Over 21.5
22%
46%
8
Over 22.5
22%
44%
13
Over 23.5
22%
39%
19
Over 24.5
22%
37%
24
Over 25.5
22%
30%
34
Over 26.5
22%
24%
48
Over 27.5
22%
24%
62
Over 28.5
11%
15%
21
Over 29.5
0%
11%
0
Over 30.5
0%
7%
0
Data Point
Percentage
Percentile
Average Total Games (3 Set Matches)
20.74
26
Over 12.5
98%
44
Over 13.5
96%
41
Over 14.5
94%
53
Over 15.5
89%
55
Over 16.5
82%
56
Over 17.5
73%
56
Over 18.5
65%
59
Over 19.5
57%
61
Over 20.5
49%
57
Over 21.5
42%
50
Over 22.5
38%
59
Over 23.5
31%
45
Over 24.5
30%
49
Over 25.5
26%
45
Over 26.5
23%
49
Over 27.5
20%
48
Over 28.5
15%
37
Over 29.5
11%
30
Over 30.5
9%
36
Break Points Won (Grass Courts)
2025 & Last 12
Career
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Last 12
Percentile
Breaks Per Match
N/A
N/A
0
Over 0.5
N/A
N/A
0
Over 1.5
N/A
N/A
0
Over 2.5
N/A
N/A
0
Over 3.5
N/A
N/A
0
Over 4.5
N/A
N/A
0
Over 5.5
N/A
N/A
0
Over 6.5
N/A
N/A
0
Data Point
2025
Last 12
Percentile
Breaks Per Match
N/A
N/A
0
Over 0.5
N/A
N/A
0
Over 1.5
N/A
N/A
0
Over 2.5
N/A
N/A
0
Over 3.5
N/A
N/A
0
Over 4.5
N/A
N/A
0
Over 5.5
N/A
N/A
0
Over 6.5
N/A
N/A
0
Over 7.5
N/A
N/A
0
Over 8.5
N/A
N/A
0
Data Point
2025
Last 12
Percentile
Average Break-Points Converted (Set 1)
N/A
N/A
0
Average Break-Points Converted (Set 2)
N/A
N/A
0
Average Break-Points Converted (Set 3)
N/A
N/A
0
will Break Serve %
N/A
N/A
0
will not Break Serve %
N/A
N/A
0
Over 0.5
N/A
N/A
0
Over 1.5
N/A
N/A
0
Over 2.5
N/A
N/A
0
Breaks Per Set data uses Set 1 as a sample.
3 Set Matches
5 Set Matches
Breaks Per Set
Data Point
2025
Number
Percentile
Breaks Per Match
2.17
N/A
61
Over 0.5
67%
4 / 6
24
Over 1.5
17%
1 / 6
0
Over 2.5
0%
0 / 6
0
Over 3.5
0%
0 / 6
0
Over 4.5
0%
0 / 6
0
Over 5.5
0%
0 / 6
0
Over 6.5
0%
0 / 6
0
Data Point
2025
Number
Percentile
Breaks Per Match
3.25
N/A
81
Over 0.5
100%
4 / 4
61
Over 1.5
100%
4 / 4
83
Over 2.5
75%
3 / 4
86
Over 3.5
0%
0 / 4
0
Over 4.5
0%
0 / 4
0
Over 5.5
0%
0 / 4
0
Over 6.5
0%
0 / 4
0
Over 7.5
0%
0 / 4
0
Over 8.5
0%
0 / 4
0
Data Point
2025
Number
Percentile
Average Break-Points Converted (Set 1)
0.50
N/A
14
Average Break-Points Converted (Set 2)
1.00
N/A
60
Average Break-Points Converted (Set 3)
N/A
N/A
0
will Break Serve %
19%
N/A
22
will not Break Serve %
19%
N/A
19
Over 0.5
29%
4 / 14
11
Over 1.5
0%
0 / 14
0
Over 2.5
0%
0 / 14
0
Breaks Per Set data uses Set 1 as a sample.
Double Faults (Grass Courts)
2025 & Last 12 Months
Career
3 Set Matches
5 Set Matches
Data Point
2025
Last 12
Percentile
Double Faults Per Match
N/A
N/A
100
Over 0.5 (1+)
N/A
N/A
100
Over 1.5 (2+)
N/A
N/A
100
Over 2.5 (3+)
N/A
N/A
100
Over 3.5 (4+)
N/A
N/A
100
Over 4.5 (5+)
N/A
N/A
100
Over 5.5 (6+)
N/A
N/A
100
Over 6.5 (7+)
N/A
N/A
100
Over 7.5 (8+)
N/A
N/A
100
Data Point
2025
Last 12
Percentile
Double Faults Per Match
N/A
N/A
100
Over 0.5 (1+)
N/A
N/A
100
Over 1.5 (2+)
N/A
N/A
100
Over 2.5 (3+)
N/A
N/A
100
Over 3.5 (4+)
N/A
N/A
100
Over 4.5 (5+)
N/A
N/A
100
Over 5.5 (6+)
N/A
N/A
100
Over 6.5 (7+)
N/A
N/A
100
Over 7.5 (8+)
N/A
N/A
100
Over 8.5 (9+)
N/A
N/A
100
Over 9.5 (10+)
N/A
N/A
100
Over 10.5 (11+)
N/A
N/A
100
3 Set Matches
5 Set Matches
Data Point
2025
Number
Percentile
Double Faults Per Match
6
36 / 6
6
Over 0.5 (1+)
100%
6 / 6
59
Over 1.5 (2+)
100%
6 / 6
36
Over 2.5 (3+)
100%
6 / 6
21
Over 3.5 (4+)
83%
5 / 6
15
Over 4.5 (5+)
67%
4 / 6
12
Over 5.5 (6+)
50%
3 / 6
18
Over 6.5 (7+)
50%
3 / 6
12
Over 7.5 (8+)
33%
2 / 6
18
Data Point
2025
Number
Percentile
Double Faults Per Match
7.5
30 / 4
3
Over 0.5 (1+)
100%
4 / 4
61
Over 1.5 (2+)
100%
4 / 4
38
Over 2.5 (3+)
75%
3 / 4
38
Over 3.5 (4+)
75%
3 / 4
24
Over 4.5 (5+)
75%
3 / 4
13
Over 5.5 (6+)
75%
3 / 4
8
Over 6.5 (7+)
50%
2 / 4
19
Over 7.5 (8+)
50%
2 / 4
15
Over 8.5 (9+)
50%
2 / 4
11
Over 9.5 (10+)
50%
2 / 4
7
Over 10.5 (11+)
25%
1 / 4
21
Latest Results For Stefan Kozlov
Date
Tournament
Player
Opponent
Total Sets
Stefan Kozlov
10 - 10
Opponent
Total Wins
Stefan Kozlov
5 - 4
Opponent
Win Percentage
Stefan Kozlov
56% - 44%
Opponent
Ranking
Elo
Titles
Tournament
Year
Result
Indian Wells Chall. Men
2024
Won
Charleston Chall. Men
2023
2nd
Acapulco ATP
2022
2nd
Indian Wells ATP
2022
2nd
Las Vegas Chall. Men
2022
2nd
Champaign Chall. Men
2021
Won
Columbus Chall. Doubles Men
2021
2nd
Lexington Chall. Doubles Men
2021
2nd
M25 Calabasas CA ITF Men
2019
2nd
London ATP
2017
Won
Suzhou Chall. Men
2016
2nd
Cincinnati ATP
2016
2nd
Little Rock ITF Men
2016
Won
Winnetka Chall. Doubles Men
2016
2nd
Maui - Hawaii Chall. Doubles Men
2015
Won
Sacramento Chall. Men
2014
2nd
Show All Titles
Ranking
Elo