Stefan Kozlov
28 year old
1 Feb 1998
22 - 21win/loss
2026 Highlights
Next Tournaments
-
Harry WendelkenH.WendelkenGBR Loss
- 2-6 6-4 6-1
- 2nd
-
13 Aug 26
L
-
Aidan MayoA.MayoUSA
- 6-3 5-7 6-2
- 1st
-
12 Aug 26
W
-
Zachary SvajdaZ.SvajdaUSA Loss
- 7-5 6-1
- q1
-
25 Jul 26
L
-
Alan MagadanA.MagadanMEX Loss
- 3-6 6-1 7-64
- 1st
-
21 Jul 26
L
-
Roger Pascual FerraR.FerraESP Loss
- 6-4 6-4
- Q.
-
20 Jul 26
L
-
Leo VithoontienL.VithoontienJPN
- 4-6 6-1 6-2
- q1
-
19 Jul 26
W
-
Yi ZhouY.ZhouCHN Loss
- 6-3 3-6 6-4
- 1st
-
14 Jul 26
L
-
Jacob FearnleyJ.FearnleyGBR Loss
- 3-6 6-3 6-2
- 2nd
-
10 Jul 26
L
-
Yibing WuY.WuCHN
- 6-4 2-6 6-4
- 1st
-
09 Jul 26
W
-
Garrett JohnsG.JohnsUSA
- 6-4 6-2
- Q.
-
07 Jul 26
W
-
Aidan MayoA.MayoUSA
- 7-63 5-7 6-3
- q1
-
05 Jul 26
W
-
Alejo Sanchez QuilezA.QuilezESP Loss
- 7-5 6-4
- Q.
-
12 May 26
L
-
Mario Mansilla DiezM.DiezESP
- 6-2 6-1
- q1
-
11 May 26
W
-
Nick HardtN.HardtDOM Loss
- 6-2 2-6 6-0
- 2nd
-
22 Apr 26
L
-
Daniil GlinkaD.GlinkaEST
- 6-2 6-3
- 1st
-
20 Apr 26
W
-
Alex RybakovA.RybakovUSA Loss
- 7-63 6-2
- 1st
-
14 Apr 26
L
-
Kilian FeldbauschK.FeldbauschSUI
- 6-1 4-6 7-62
- Q.
-
13 Apr 26
W
-
Strong KirchheimerS.KirchheimerUSA
- 6-0 6-4
- q1
-
12 Apr 26
W
-
James DuckworthJ.DuckworthAUS Loss
- 6-3 6-2
- 2nd
-
08 Apr 26
L
-
Raphael PerotR.PerotFRA
- 6-3 6-1
- 1st
-
06 Apr 26
W
-
Alan MagadanA.MagadanMEX Loss
- 6-3 7-67
- 1st
-
31 Mar 26
L
-
Andres MartinA.MartinUSA Loss
- 6-2 6-2
- 1st
-
24 Mar 26
L
-
Michael MmohM.MmohUSA Loss
- 7-5 6-2
- 2nd
-
19 Mar 26
L
-
Alan MagadanA.MagadanMEX
- 6-4 6-4
- 1st
-
17 Mar 26
W
-
Jay Dylan Hara FriendJ.FriendJPN Loss
- 6-2 4-6 6-3
- 1st
-
11 Mar 26
L
-
Marc PolmansM.PolmansAUS
- 6-1 3-6 6-4
- Q.
-
10 Mar 26
W
-
Nathan PonwithN.PonwithUSA
- 7-5 6-4
- q1
-
09 Mar 26
W
-
Patrick KypsonP.KypsonUSA Loss
- 7-63 6-0
- q1
-
21 Feb 26
L
-
Rodrigo Pacheco MendezR.MendezMEX Loss
- 6-4 6-2
- 1/4
-
20 Feb 26
L
-
Karl PolingK.PolingUSA
- 6-4 7-64
- 2nd
-
18 Feb 26
W
-
Tristan MccormickT.MccormickUSA
- 6-3 6-74 6-4
- 1st
-
16 Feb 26
W
-
Keegan SmithK.SmithUSA Loss
- 6-3 6-2
- 1/4
-
06 Feb 26
L
-
Raphael PerotR.PerotFRA
- 7-65 3-6 6-3
- 2nd
-
04 Feb 26
W
-
Cedrik-Marcel StebeC.StebeGER
- 3-6 6-2 6-3
- 1st
-
02 Feb 26
W
-
Sho ShimabukuroS.ShimabukuroJPN Loss
- 6-2 4-6 7-65
- 1st
-
28 Jan 26
L
-
Francesco PassaroF.PassaroITA Loss
- 6-3 1-6 6-1
- 2nd
-
22 Jan 26
L
-
Alexis GalarneauA.GalarneauCAN
- 7-62 2-6 6-1
- 1st
-
20 Jan 26
W
-
Mikhail KukushkinM.KukushkinKAZ
- 6-4 6-2
- Q.
-
19 Jan 26
W
-
Robert StrombachsR.StrombachsGER
- 6-3 5-0 ret.
- q1
-
18 Jan 26
W
-
Harry WendelkenH.WendelkenGBR Loss
- 6-1 3-6 6-4
- 1st
-
13 Jan 26
L
-
Toby SamuelT.SamuelGBR Loss
- 7-61 6-4
- 1/4
-
08 Jan 26
L
-
Mathys ErhardM.ErhardFRA
- 6-2 6-4
- 2nd
-
07 Jan 26
W
-
Tyler ZinkT.ZinkUSA
- 6-4 6-1
- 1st
-
06 Jan 26
W
Latest Tonic News
-
How Alexander Zverev navigated an open draw to capture the US Open title
-
“Should be a fault,” John McEnroe calls for stricter serve clock rulings vs. Zverev’s ball-bouncing routine
-
“I thought the score was 5-1 instead of 6-2,” Alexander Zverev reveals after US Open triumph
-
Jannik Sinner confirms Vienna title defense in bid for tournament hat-trick
|
| Year | Sum. | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2026 | 22-21 | 7-11 | 5-5 | 7-4 | 3-1 | 0-0 |
| 2025 | 28-12 | 12-6 | 6-2 | 10-3 | 0-1 | 0-0 |
| 2024 | 37-19 | 16-9 | 17-8 | 4-2 | 0-0 | 0-0 |
| 2023 | 6-12 | 1-6 | 0-0 | 5-6 | 0-0 | 0-0 |
| 2022 | 21-34 | 14-18 | 0-5 | 4-5 | 3-6 | 0-0 |
| 2021 | 41-15 | 20-12 | 5-2 | 16-1 | 0-0 | 0-0 |
| 2020 | 13-13 | 7-8 | 0-0 | 6-5 | 0-0 | 0-0 |
| 2019 | 22-18 | 14-9 | 4-4 | 4-5 | 0-0 | 0-0 |
| 2018 | 13-26 | 4-12 | 7-6 | 1-4 | 1-4 | 0-0 |
| 2017 | 31-29 | 15-14 | 8-8 | 3-2 | 5-5 | 0-0 |
| 2016 | 58-31 | 28-15 | 10-6 | 16-5 | 4-5 | 0-0 |
| 2015 | 44-27 | 15-12 | 10-5 | 17-8 | 2-2 | 0-0 |
| 2014 | 17-15 | 15-10 | 2-3 | 0-2 | 0-0 | 0-0 |
| 2013 | 13-8 | 3-2 | 10-5 | 0-0 | 0-1 | 0-0 |
| 2012 | 2-1 | 2-1 | 0-0 | 0-0 | 0-0 | 0-0 |
| Total | 368-281 | 173-145 | 84-59 | 93-52 | 18-25 | 0-0 |