Match log updated: 2026-07-18 01:15 UTC

Stefan Kozlov — ATP Match Log

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Main draw matches: 35 | W: 9 | L: 26 | Win %: 25.7%

79 qualifying matches shown below; qualifying is excluded from main-draw summaries and leaderboards.

Date ↓TournamentCategoryRoundSurfaceOpponentScoreResultH2HMatch
Feb 21, 2026 Abierto Mexicano Telcel Presentado Por HSBC ATP 500 Q1 Q Hard Patrick Kypson #105 6-7(3) 0-6 L H2H Match data
Feb 24, 2025* Abierto Mexicano Telcel Presentado Por HSBC ATP 500 Q2 Q Hard Nishesh Basavareddy #106 2-6 4-6 L H2H Match data
Feb 24, 2025* Abierto Mexicano Telcel Presentado Por HSBC ATP 500 Q1 Q Hard Duarte Vale #474 6-1 6-4 W H2H Match data
Feb 10, 2025* Delray Beach Open ATP 250 Q1 Q Hard Zachary Svajda #169 3-6 0-6 L H2H Match data
Apr 1, 2024 Houston ATP 250 Q1 Q Clay Denis Yevseyev #182 2-6 0-6 L H2H Match data
Feb 12, 2024 Delray Beach ATP 250 Q1 Q Hard Shintaro Mochizuki #142 3-6 6-7(2) L H2H Match data
Aug 20, 2023* Winston-Salem ATP 250 Q1 Q Hard Inaki Montes De La Torre 6-3 1-6 3-6 L — Match data
Mar 8, 2023* Indian Wells Masters Masters 1000 Q1 Q Hard Roberto Marcora #594 1-6 3-6 L H2H Match data
Feb 13, 2023 Delray Beach ATP 250 Q1 Q Hard Matija Pecotic #784 6-7(1) 5-5 (ret.) L H2H Match data
Feb 6, 2023 Dallas ATP 250 Q2 Q Hard Zachary Svajda #265 3-6 4-6 L H2H Match data
Feb 6, 2023 Dallas ATP 250 Q1 Q Hard Thai-Son Kwiatkowski #1279 6-3 6-4 W H2H Match data
Jan 16, 2023 Australian Open Grand Slam Q1 Q Hard Oleksii Krutykh #188 5-7 2-6 L H2H Match data
Sep 22, 2022* San Diego ATP 250 R32 Hard J.J. Wolf #73 2-6 6-7(6) L H2H Match data
Aug 31, 2022* US Open Grand Slam R128 Hard Daniil Medvedev #1 2-6 4-6 0-6 L H2H Match data
Aug 14, 2022* Cincinnati Masters Masters 1000 Q1 Q Hard Dusan Lajovic #68 3-6 5-7 L H2H Match data
Aug 3, 2022* Washington ATP 500 R64 Hard Jack Draper #81 5-7 2-6 L H2H Match data
Jul 25, 2022 Atlanta ATP 250 Q1 Q Hard Ramkumar Ramanathan #229 0-6 1-6 L H2H Match data
Jul 14, 2022* Newport ATP 250 R32 Grass Steve Johnson #95 5-7 3-6 L H2H Match data
Jun 29, 2022* Wimbledon Grand Slam R128 Grass Diego Schwartzman #15 3-6 2-6 2-6 L H2H Match data
Jun 28, 2022* Wimbledon Grand Slam Q3 Q Grass Dennis Novak #153 5-7 4-6 7-5 6-3 3-6 L H2H Match data
Jun 28, 2022* Wimbledon Grand Slam Q2 Q Grass Dominic Stricker #183 7-6(9) 4-6 6-3 W H2H Match data
Jun 27, 2022 Wimbledon Grand Slam Q1 Q Grass Evan Furness #230 7-5 6-3 W H2H Match data
Jun 13, 2022 Queen's Club ATP 250 Q1 Q Grass Steve Johnson #93 0-6 0-6 L H2H Match data
Jun 6, 2022 S Hertogenbosch ATP 250 Q1 Q Grass Matthew Ebden #432 4-6 4-6 L H2H Match data
May 22, 2022* Roland Garros Grand Slam Q1 Q Clay Nino Serdarusic #188 5-7 0-6 L H2H Match data
Mar 23, 2022* Miami Masters Masters 1000 Q1 Q Hard Mitchell Krueger #160 2-6 2-6 L H2H Match data
Mar 11, 2022* Indian Wells Masters Masters 1000 Q2 Q Hard Holger Rune #86 4-6 2-6 L H2H Match data
Mar 10, 2022* Indian Wells Masters Masters 1000 Q1 Q Hard Sebastian Sec 6-3 6-7(4) 6-2 W H2H Match data
Feb 24, 2022* Acapulco ATP 500 R16 Hard Rafael Nadal #5 0-6 3-6 L H2H Match data
Feb 23, 2022* Acapulco ATP 500 R32 Hard Grigor Dimitrov #33 7-6(8) 5-7 6-3 W H2H Match data
Feb 21, 2022 Acapulco ATP 500 Q2 Q Hard Oscar Otte #82 1-6 6-0 6-7(2) L H2H Match data
Feb 21, 2022 Acapulco ATP 500 Q1 Q Hard Steve Johnson #91 6-4 6-3 W H2H Match data
Feb 19, 2022* Delray Beach ATP 250 QF Hard Tommy Paul #41 3-6 1-6 L H2H Match data
Feb 18, 2022* Delray Beach ATP 250 R16 Hard Steve Johnson #99 6-1 6-3 W H2H Match data
Feb 17, 2022* Delray Beach ATP 250 R32 Hard Emilio Gomez #149 4-6 7-5 6-3 W H2H Match data
Feb 14, 2022 Delray Beach ATP 250 Q2 Q Hard Bjorn Fratangelo #152 6-3 1-0 (ret.) W H2H Match data
Feb 14, 2022 Delray Beach ATP 250 Q1 Q Hard Go Soeda #287 7-5 6-2 W H2H Match data
Jan 20, 2022* Australian Open Grand Slam R64 Hard Matteo Berrettini #7 1-6 6-4 4-6 1-6 L H2H Match data
Jan 19, 2022* Australian Open Grand Slam R128 Hard Jiri Vesely #78 7-5 6-3 6-4 W H2H Match data
Jan 10, 2022 Sydney ATP 250 Q1 Q Hard Denis Kudla #109 6-4 6-7(7) 3-6 L H2H Match data
Oct 8, 2021* Indian Wells Masters Masters 1000 Q2 Q Hard Christopher Eubanks #194 6-2 0-6 5-7 L H2H Match data
Oct 7, 2021* Indian Wells Masters Masters 1000 Q1 Q Hard Jason Jung #165 6-3 3-6 5-2 (ret.) W H2H Match data
Aug 30, 2021 US Open Grand Slam Q1 Q Hard Bernabe Zapata Miralles #116 5-7 6-1 3-6 L H2H Match data
Mar 17, 2021* Acapulco ATP 500 R32 Hard Cameron Norrie #61 3-6 3-6 L H2H Match data
Mar 16, 2021* Acapulco ATP 500 Q3 Q Hard Botic van de Zandschulp #149 6-3 1-0 (ret.) W H2H Match data
Mar 15, 2021 Acapulco ATP 500 Q2 Q Hard Joao Sousa #102 6-2 2-6 6-3 W H2H Match data
Mar 15, 2021 Acapulco ATP 500 Q1 Q Hard Jordi Arconada 6-4 6-1 W — Match data
Jan 7, 2021* Delray Beach ATP 250 Q2 Q Hard Donald Young #327 6-4 4-6 4-6 L H2H Match data
Jan 7, 2021* Delray Beach ATP 250 Q1 Q Hard Johannes Haerteis #305 5-0 (ret.) W H2H Match data
Feb 20, 2020* Delray Beach ATP 250 R32 Hard Ugo Humbert #44 7-6(5) 3-6 1-6 L H2H Match data
Feb 17, 2020 Delray Beach ATP 250 Q2 Q Hard Emilio Gomez #148 3-6 2-6 L H2H Match data
Feb 17, 2020 Delray Beach ATP 250 Q1 Q Hard Alex Bolt #136 4-6 6-4 6-2 W H2H Match data
Aug 26, 2019 US Open Grand Slam Q1 Q Hard Egor Gerasimov #129 4-6 4-6 L H2H Match data
Jul 30, 2018 Washington ATP 500 Q1 Q Hard Jared Hiltzik #420 3-6 3-6 L H2H Match data
Jul 3, 2018* Wimbledon Grand Slam Q2 Q Grass Yannick Maden #134 1-6 3-6 L H2H Match data
Jul 2, 2018 Wimbledon Grand Slam Q1 Q Grass Dustin Brown #207 6-3 6-1 W H2H Match data
May 27, 2018* Roland Garros Grand Slam Q1 Q Clay Yasutaka Uchiyama #234 4-6 5-7 L H2H Match data
Apr 12, 2018* Houston ATP 250 R32 Clay Guido Pella #63 3-6 2-6 L H2H Match data
Apr 9, 2018 Houston ATP 250 Q2 Q Clay Akira Santillan #170 6-2 6-0 W H2H Match data
Apr 9, 2018 Houston ATP 250 Q1 Q Clay Thomaz Bellucci #144 6-7(3) 6-3 7-6(5) W H2H Match data
Mar 21, 2018* Miami Masters Masters 1000 Q1 Q Hard Cameron Norrie #105 1-6 0-2 (ret.) L H2H Match data
Mar 8, 2018* Indian Wells Masters Masters 1000 Q1 Q Hard Adrian Menendez Maceiras 2-6 6-7(8) L — Match data
Feb 19, 2018 Delray Beach ATP 250 Q1 Q Hard Ramkumar Ramanathan #140 3-6 2-6 L H2H Match data
Jan 16, 2018* Australian Open Grand Slam Q3 Q Hard Dustin Brown #129 4-6 6-3 3-6 L H2H Match data
Jan 16, 2018* Australian Open Grand Slam Q2 Q Hard Yannick Hanfmann #115 4-6 7-6(2) 6-4 W H2H Match data
Jan 15, 2018 Australian Open Grand Slam Q1 Q Hard Blake Ellis #679 7-6(3) 4-6 7-6(3) W H2H Match data
Aug 28, 2017 US Open Grand Slam Q1 Q Hard Guido Andreozzi #150 4-6 1-6 L H2H Match data
Aug 15, 2017* Cincinnati Masters Masters 1000 R64 Hard Sam Querrey #20 3-6 0-6 L H2H Match data
Aug 2, 2017* Washington ATP 500 R64 Hard Yuki Bhambri #200 5-7 0-2 (ret.) L H2H Match data
Jul 27, 2017* Atlanta ATP 250 R32 Hard Quentin Halys #134 5-7 6-7(7) L H2H Match data
Jul 24, 2017 Atlanta ATP 250 Q2 Q Hard Brydan Klein #239 6-7(9) 6-2 7-6(4) W H2H Match data
Jul 24, 2017 Atlanta ATP 250 Q1 Q Hard Catalin-Ionut Gard #1458 6-3 6-1 W H2H Match data
Jul 20, 2017* Newport ATP 250 R32 Grass Adrian Menendez Maceiras 2-6 6-7(5) L — Match data
Jul 4, 2017* Wimbledon Grand Slam Q2 Q Grass Dennis Novikov #175 5-7 2-6 L H2H Match data
Jul 3, 2017 Wimbledon Grand Slam Q1 Q Grass Marc Polmans #202 6-4 7-5 W H2H Match data
Jun 23, 2017* Queen's Club ATP 250 R16 Grass Marin Cilic #7 0-6 4-6 L H2H Match data
Jun 22, 2017* Queen's Club ATP 250 R32 Grass Steve Johnson #25 3-6 6-1 6-1 W H2H Match data
Jun 19, 2017 Queen's Club ATP 250 Q2 Q Grass Pierre-Hugues Herbert #71 6-4 6-2 W H2H Match data
Jun 19, 2017 Queen's Club ATP 250 Q1 Q Grass Kenny De Schepper #150 6-7(4) 6-3 6-4 W H2H Match data
Jun 16, 2017* S Hertogenbosch ATP 250 R16 Grass Ivo Karlovic #24 4-6 1-6 L H2H Match data
Jun 15, 2017* S Hertogenbosch ATP 250 R32 Grass Dustin Brown #90 6-3 3-6 6-3 W H2H Match data
May 29, 2017 Roland Garros Grand Slam Q2 Q Clay Sergiy Stakhovsky #123 7-6(5) 4-6 4-6 L H2H Match data
May 28, 2017* Roland Garros Grand Slam Q1 Q Clay Corentin Moutet #345 2-6 7-5 6-4 W H2H Match data
Mar 23, 2017* Miami Masters Masters 1000 Q2 Q Hard Jared Donaldson #95 5-7 3-6 L H2H Match data
Mar 22, 2017* Miami Masters Masters 1000 Q1 Q Hard Nicola Kuhn #710 6-3 3-6 6-3 W H2H Match data
Mar 11, 2017* Indian Wells Masters Masters 1000 R128 Hard Donald Young #60 5-7 6-7(5) L H2H Match data
Mar 1, 2017* Acapulco ATP 500 R32 Hard Ernesto Escobedo #113 1-6 6-2 0-6 L H2H Match data
Feb 27, 2017 Acapulco ATP 500 Q2 Q Hard Jared Donaldson #91 7-5 6-3 W H2H Match data
Feb 27, 2017 Acapulco ATP 500 Q1 Q Hard Hyeon Chung #90 6-2 6-2 W H2H Match data
Feb 23, 2017* Delray Beach ATP 250 R32 Hard Steve Johnson #26 1-6 4-6 L H2H Match data
Jan 16, 2017 Australian Open Grand Slam Q1 Q Hard Yuki Bhambri #378 1-6 4-6 L H2H Match data
Jan 1, 2017* Brisbane ATP 250 Q1 Q Hard John-Patrick Smith #226 2-6 3-6 L H2H Match data
Aug 29, 2016 US Open Grand Slam Q1 Q Hard Michael Berrer #145 6-2 6-7(5) 2-6 L H2H Match data
Aug 14, 2016* Cincinnati Masters Masters 1000 Q2 Q Hard Malek Jaziri #59 4-6 2-6 L H2H Match data
Aug 14, 2016* Cincinnati Masters Masters 1000 Q1 Q Hard Damir Dzumhur #75 6-4 3-6 7-5 W H2H Match data
Jul 15, 2016* Newport ATP 250 R16 Grass Donald Young #61 0-6 4-6 L H2H Match data
Jul 14, 2016* Newport ATP 250 R32 Grass Benjamin Becker #96 6-1 6-2 W H2H Match data
Jun 27, 2016 Wimbledon Grand Slam Q1 Q Grass Daniil Medvedev #228 2-6 2-6 L H2H Match data
Jun 13, 2016 Queen's Club ATP 250 Q1 Q Grass Vasek Pospisil #46 6-7(5) 6-7(6) L H2H Match data
Jun 12, 2016* S Hertogenbosch ATP 250 QF Grass Sam Querrey #37 3-6 0-6 L H2H Match data
Jun 11, 2016* S Hertogenbosch ATP 250 R16 Grass Steve Johnson #39 6-3 6-4 W H2H Match data
Jun 9, 2016* S Hertogenbosch ATP 250 R32 Grass Yoshihito Nishioka #117 6-1 2-6 6-3 W H2H Match data
May 22, 2016* Roland Garros Grand Slam Q1 Q Clay Grega Zemlja #155 6-3 3-6 1-6 L H2H Match data
Aug 31, 2015 US Open Grand Slam Q1 Q Hard Guido Andreozzi #183 2-6 7-5 3-6 L H2H Match data
Aug 16, 2015 Cincinnati Masters Masters 1000 Q1 Q Hard Yen-Hsun Lu #82 4-6 3-6 L H2H Match data
Feb 19, 2015* Delray Beach ATP 250 R32 Hard Tim Smyczek #80 5-7 2-6 L H2H Match data
Feb 12, 2015* Memphis ATP 250 R32 Hard Jared Donaldson #180 5-7 0-6 L H2H Match data
Oct 23, 2014* Valencia ATP 250 R32 Hard Martin Klizan #37 3-6 3-6 L H2H Match data
Aug 26, 2014* US Open Grand Slam Q2 Q Hard Borna Coric #204 6-2 2-6 2-6 L H2H Match data
Aug 25, 2014 US Open Grand Slam Q1 Q Hard Mitchell Frank #508 3-6 6-0 6-2 W H2H Match data
Jul 28, 2014 Washington ATP 500 Q1 Q Hard Sam Groth #96 6-3 6-7(5) 4-6 L H2H Match data
Mar 6, 2014 Indian Wells Masters Masters 1000 Q1 Q Hard Sam Groth #176 3-6 4-6 L H2H Match data
Feb 17, 2014 Delray Beach ATP 250 Q1 Q Hard Sekou Bangoura #597 2-6 6-4 3-6 L H2H Match data
Jul 11, 2013* Newport ATP 250 R32 Grass Michal Przysiezny #113 3-6 7-6(9) 4-6 L H2H Match data