Stefan Kozlov Statistics (USA)
Country: United States of America, Born February 1, 1998 (26 years old), Category: ATP
2024 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 16 | 0 | 34 | 19 | 15 | 0.559 | 1 | 1 | 5 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|
| Challenger 75 | 12 | 0 | 22 | 11 | 11 | 0.500 | 1 | 0 | 2 | 2 |
| Challenger 50 | 4 | 0 | 12 | 8 | 4 | 0.667 | 0 | 1 | 3 | 2 |
2023 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 4 | 0 | 6 | 2 | 4 | 0.333 | 0 | 0 | 1 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|
| Challenger 100 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 1 |
| Challenger 75 | 3 | 0 | 5 | 2 | 3 | 0.400 | 0 | 0 | 1 | 1 |
2022 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 24 | 0 | 39 | 15 | 24 | 0.385 | 0 | 4 | 5 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| Grand Slam (Men's) | 3 | 0 | 4 | 1 | 3 | 0.250 | 0 | 1 | 0 | 0 |
| ATP 500 | 2 | 0 | 3 | 1 | 2 | 0.333 | 0 | 1 | 1 | 0 |
| ATP 250 | 3 | 0 | 5 | 2 | 3 | 0.400 | 0 | 0 | 0 | 1 |
| Challenger 125 | 2 | 0 | 3 | 1 | 2 | 0.333 | 0 | 0 | 1 | 0 |
| Challenger 80 | 14 | 0 | 24 | 10 | 14 | 0.417 | 0 | 2 | 3 | 4 |
2021 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 16 | 3 | 42 | 30 | 12 | 0.714 | 2 | 0 | 5 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 500 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 0 |
| Challenger 80 | 12 | 3 | 34 | 25 | 9 | 0.735 | 2 | 0 | 5 | 2 |
| M25 | 2 | 0 | 3 | 1 | 2 | 0.333 | 0 | 0 | 0 | 1 |
| M15 | 1 | 0 | 4 | 4 | 0 | 1.000 | 0 | 0 | 0 | 0 |
2020 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 11 | 0 | 21 | 10 | 11 | 0.476 | 1 | 0 | 3 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 250 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 1 | 0 |
| Challenger 100 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 0 |
| Challenger 80 | 2 | 0 | 6 | 4 | 2 | 0.667 | 0 | 0 | 2 | 1 |
| M25 | 4 | 0 | 9 | 5 | 4 | 0.556 | 0 | 0 | 0 | 0 |
| M15 | 3 | 0 | 4 | 1 | 3 | 0.250 | 1 | 0 | 0 | 0 |
2019 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 16 | 0 | 38 | 22 | 16 | 0.579 | 4 | 1 | 3 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| Challenger 110 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 0 |
| Challenger 90 | 3 | 0 | 5 | 2 | 3 | 0.400 | 0 | 1 | 0 | 2 |
| Challenger 80 | 9 | 0 | 22 | 13 | 9 | 0.591 | 1 | 0 | 2 | 2 |
| M25 | 2 | 0 | 8 | 6 | 2 | 0.750 | 3 | 0 | 1 | 1 |
| M15 | 1 | 0 | 2 | 1 | 1 | 0.500 | 0 | 0 | 0 | 0 |
2018 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 14 | 0 | 20 | 6 | 14 | 0.300 | 0 | 1 | 2 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 250 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 0 |
| Challenger 125 | 6 | 0 | 8 | 2 | 6 | 0.250 | 0 | 0 | 0 | 1 |
| Challenger 110 | 2 | 0 | 4 | 2 | 2 | 0.500 | 0 | 0 | 2 | 2 |
| Challenger 100 | 2 | 0 | 4 | 2 | 2 | 0.500 | 0 | 0 | 0 | 1 |
| Challenger 90 | 2 | 0 | 2 | 0 | 2 | 0.000 | 0 | 0 | 0 | 1 |
| Challenger 80 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 1 | 0 | 0 |
2017 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 23 | 1 | 42 | 20 | 22 | 0.476 | 0 | 3 | 2 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 1000 | 2 | 0 | 2 | 0 | 2 | 0.000 | 0 | 1 | 0 | 1 |
| ATP 500 | 3 | 0 | 4 | 1 | 3 | 0.250 | 0 | 2 | 0 | 0 |
| ATP 250 | 4 | 0 | 5 | 1 | 4 | 0.200 | 0 | 0 | 0 | 2 |
| Challenger 125 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 0 |
| Challenger 100 | 3 | 0 | 6 | 3 | 3 | 0.500 | 0 | 0 | 0 | 1 |
| Challenger 90 | 7 | 0 | 17 | 10 | 7 | 0.588 | 0 | 0 | 1 | 3 |
| Challenger 80 | 3 | 1 | 7 | 5 | 2 | 0.714 | 0 | 0 | 1 | 1 |
2016 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 27 | 4 | 76 | 53 | 23 | 0.697 | 3 | 4 | 12 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 250 | 2 | 0 | 5 | 3 | 2 | 0.600 | 0 | 2 | 0 | 0 |
| Challenger 110 | 1 | 0 | 3 | 2 | 1 | 0.667 | 0 | 0 | 1 | 0 |
| Challenger 100 | 3 | 0 | 8 | 5 | 3 | 0.625 | 0 | 0 | 0 | 0 |
| Challenger 90 | 2 | 1 | 10 | 9 | 1 | 0.900 | 1 | 1 | 2 | 0 |
| Challenger 80 | 12 | 0 | 27 | 15 | 12 | 0.556 | 1 | 1 | 3 | 2 |
| M25 | 7 | 3 | 23 | 19 | 4 | 0.826 | 1 | 0 | 6 | 3 |
2015 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 23 | 1 | 63 | 41 | 22 | 0.651 | 8 | 4 | 5 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 250 | 2 | 0 | 2 | 0 | 2 | 0.000 | 0 | 1 | 0 | 0 |
| Challenger 80 | 8 | 0 | 13 | 5 | 8 | 0.385 | 1 | 0 | 1 | 4 |
| M25 | 2 | 0 | 9 | 7 | 2 | 0.778 | 0 | 2 | 1 | 3 |
| M15 | 10 | 1 | 32 | 23 | 9 | 0.719 | 7 | 1 | 2 | 2 |
| Boys 18 | 1 | 0 | 7 | 6 | 1 | 0.857 | 0 | 0 | 1 | 0 |
2014 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 17 | 1 | 55 | 39 | 16 | 0.709 | 5 | 1 | 13 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 500 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 0 |
| Challenger 100 | 1 | 0 | 5 | 4 | 1 | 0.800 | 0 | 0 | 2 | 0 |
| Challenger 80 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 1 |
| M25 | 3 | 0 | 6 | 3 | 3 | 0.500 | 0 | 0 | 0 | 0 |
| M15 | 3 | 0 | 7 | 4 | 3 | 0.571 | 0 | 0 | 1 | 2 |
| Boys 18 | 1 | 0 | 6 | 5 | 1 | 0.833 | 2 | 0 | 2 | 0 |
| JR Grand Slam Boys | 4 | 0 | 20 | 16 | 4 | 0.800 | 2 | 1 | 7 | 1 |
| J500 Boys | 1 | 1 | 6 | 6 | 0 | 1.000 | 1 | 0 | 1 | 0 |
| J300 Boys | 2 | 0 | 3 | 1 | 2 | 0.333 | 0 | 0 | 0 | 0 |
2013 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 22 | 1 | 63 | 42 | 21 | 0.667 | 8 | 1 | 3 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|
| ATP 250 | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 1 | 0 |
| M25 | 5 | 0 | 9 | 4 | 5 | 0.444 | 0 | 1 | 0 | 2 |
| M15 | 2 | 0 | 5 | 3 | 2 | 0.600 | 1 | 0 | 0 | 0 |
| Boys 18 | 1 | 0 | 2 | 1 | 1 | 0.500 | 2 | 0 | 0 | 1 |
| JR Grand Slam Boys | 3 | 0 | 7 | 4 | 3 | 0.571 | 0 | 0 | 0 | 0 |
| J500 Boys | 3 | 0 | 13 | 10 | 3 | 0.769 | 3 | 0 | 1 | 1 |
| J300 Boys | 6 | 1 | 23 | 18 | 5 | 0.783 | 2 | 0 | 1 | 0 |
| J200 Boys | 1 | 0 | 3 | 2 | 1 | 0.667 | 0 | 0 | 0 | 0 |
2012 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 14 | 0 | 38 | 24 | 14 | 0.632 | 3 | 3 | 6 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|
| M25 | 1 | 0 | 3 | 2 | 1 | 0.667 | 0 | 1 | 2 | 1 |
| Boys 18 | 1 | 0 | 4 | 3 | 1 | 0.750 | 0 | 0 | 0 | 0 |
| JR Grand Slam Boys | 2 | 0 | 5 | 3 | 2 | 0.600 | 0 | 1 | 1 | 1 |
| J500 Boys | 2 | 0 | 4 | 2 | 2 | 0.500 | 1 | 1 | 1 | 0 |
| JB1 Boys | 1 | 0 | 4 | 3 | 1 | 0.750 | 0 | 0 | 1 | 1 |
| J300 Boys | 6 | 0 | 17 | 11 | 6 | 0.647 | 2 | 0 | 1 | 1 |
| J200 Boys | 1 | 0 | 1 | 0 | 1 | 0.000 | 0 | 0 | 0 | 0 |
2011 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 17 | 3 | 65 | 51 | 14 | 0.785 | 8 | 0 | 13 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|
| JB1 Boys | 1 | 0 | 3 | 2 | 1 | 0.667 | 1 | 0 | 0 | 1 |
| J300 Boys | 1 | 0 | 2 | 1 | 1 | 0.500 | 0 | 0 | 1 | 0 |
| J60 Boys | 4 | 0 | 16 | 12 | 4 | 0.750 | 1 | 0 | 6 | 2 |
| J30 Boys | 1 | 1 | 6 | 6 | 0 | 1.000 | 1 | 0 | 1 | 0 |
| Boys 16 | 6 | 0 | 18 | 12 | 6 | 0.667 | 2 | 0 | 2 | 2 |
| Boys 14 | 4 | 2 | 20 | 18 | 2 | 0.900 | 3 | 0 | 3 | 2 |
2010 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 13 | 2 | 58 | 47 | 11 | 0.810 | 7 | 1 | 6 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 16 | 5 | 0 | 22 | 17 | 5 | 0.773 | 1 | 0 | 3 | 4 |
| Boys 14 | 8 | 2 | 36 | 30 | 6 | 0.833 | 6 | 1 | 3 | 0 |
2009 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 13 | 3 | 57 | 47 | 10 | 0.825 | 18 | 2 | 4 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 16 | 1 | 0 | 3 | 2 | 1 | 0.667 | 0 | 0 | 0 | 0 |
| Boys 14 | 9 | 1 | 36 | 28 | 8 | 0.778 | 11 | 2 | 2 | 4 |
| Boys 12 | 3 | 2 | 18 | 17 | 1 | 0.944 | 7 | 0 | 2 | 0 |
2008 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 6 | 2 | 23 | 19 | 4 | 0.826 | 7 | 1 | 1 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 14 | 2 | 0 | 3 | 1 | 2 | 0.333 | 0 | 1 | 0 | 0 |
| Boys 12 | 4 | 2 | 20 | 18 | 2 | 0.900 | 7 | 0 | 1 | 1 |
2007 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 12 | 9 | 1 | 27 | 19 | 8 | 0.704 | 6 | 4 | 4 | 2 |
2006 Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 12 | 1 | 0 | 2 | 1 | 1 | 0.500 | 1 | 0 | 0 | 0 |
USTA Statistics
2015 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 18 - Level 1 | 1 | 0 | 7 | 6 | 1 | 0.857 | 0 | 0 | 1 | 0 |
2014 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 2 | 1 | 12 | 11 | 1 | 0.917 | 3 | 0 | 3 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 18 - Level 1 | 1 | 0 | 6 | 5 | 1 | 0.833 | 2 | 0 | 2 | 0 |
| Boys 18 - Level 1A | 1 | 1 | 6 | 6 | 0 | 1.000 | 1 | 0 | 1 | 0 |
2013 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 4 | 1 | 18 | 15 | 3 | 0.833 | 5 | 0 | 1 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 18 - Level 1 | 3 | 1 | 12 | 10 | 2 | 0.833 | 3 | 0 | 0 | 1 |
| Boys 18 - Level 1A | 1 | 0 | 6 | 5 | 1 | 0.833 | 2 | 0 | 1 | 1 |
2012 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 18 - Level 1 | 3 | 0 | 14 | 11 | 3 | 0.786 | 2 | 0 | 1 | 1 |
2011 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 11 | 1 | 43 | 33 | 10 | 0.767 | 3 | 0 | 9 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 18 - Level 3 | 3 | 0 | 14 | 11 | 3 | 0.786 | 1 | 0 | 5 | 2 |
| Boys 16 - Level 1 | 4 | 0 | 11 | 7 | 4 | 0.636 | 1 | 0 | 0 | 0 |
| Boys 16 - Level 1A | 1 | 0 | 2 | 1 | 1 | 0.500 | 0 | 0 | 1 | 1 |
| Boys 16 - Level 2 | 1 | 0 | 5 | 4 | 1 | 0.800 | 1 | 0 | 1 | 1 |
| Boys 14 - Level 1A | 1 | 0 | 7 | 6 | 1 | 0.857 | 0 | 0 | 2 | 1 |
| Boys 14 - Level 2 | 1 | 1 | 4 | 4 | 0 | 1.000 | 0 | 0 | 0 | 0 |
2010 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 | Total | 9 | 1 | 42 | 34 | 8 | 0.810 | 7 | 1 | 5 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 16 - Level 1 | 1 | 0 | 2 | 1 | 1 | 0.500 | 0 | 0 | 1 | 0 |
| Boys 16 - Level 2 | 1 | 0 | 3 | 2 | 1 | 0.667 | 0 | 0 | 0 | 1 |
| Boys 16 - Level 3 | 3 | 0 | 17 | 14 | 3 | 0.824 | 1 | 0 | 2 | 3 |
| Boys 14 - Level 1 | 2 | 1 | 14 | 13 | 1 | 0.929 | 5 | 0 | 1 | 0 |
| Boys 14 - Level 1A | 1 | 0 | 2 | 1 | 1 | 0.500 | 0 | 0 | 1 | 0 |
| Boys 14 - Level 4 | 1 | 0 | 4 | 3 | 1 | 0.750 | 1 | 1 | 0 | 0 |
2009 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 14 - Level 1 | 1 | 0 | 3 | 2 | 1 | 0.667 | 0 | 0 | 0 | 0 |
2007 USTA Stats
| Tierlevel | Tourn. | Titles | Matches | Wins | Losses | PCT | 6-0 | 0-6 | 7-6 | 6-7 |
|---|---|---|---|---|---|---|---|---|---|---|
| Boys 12 - Level 1 | 1 | 0 | 4 | 3 | 1 | 0.750 | 1 | 0 | 0 | 0 |
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