Challenger Indian Wells 01/23 18:30 19 Bruno Kuzuhara v Stefan Kozlov 7-6,6-4
Challenger Indian Wells Qual 01/21 21:10 14 Stefan Kozlov v Alafia Ayeni 6-4,6-3
Challenger Indian Wells 01/18 19:00 26 Paul Jubb v Stefan Kozlov 4-6,6-3,6-3
Challenger Indian Wells 01/16 21:35 25 Stefan Kozlov v Gabriel Debru 6-1,3-6,6-2
Challenger Indian Wells 01/15 22:25 19 Edan Leshem v Stefan Kozlov 5-7,3-6
Challenger Indian Wells 01/15 19:40 14 Stefan Kozlov v Ezekiel Clark 2-6,7-6,6-4
Challenger Champaign 11/14 00:00 25 Stefan Kozlov v Karlis Ozolins 6-2,3-6,4-6
Challenger Knoxville 11/05 15:00 14 Stefan Kozlov v Dmitry Popko 4-6,3-6
Challenger Charlottesville 10/31 16:45 25 Lucas Gerch v Stefan Kozlov 6-2,5-7,7-6
Challenger Charlottesville 10/30 15:55 19 Stefan Kozlov v Pedro Rodenas 6-3,6-1
Challenger Charlottesville 10/29 18:45 14 Stefan Kozlov v Adit Sinha 6-2,6-4
Challenger Charleston 09/25 17:05 19 Stefan Dostanic v Stefan Kozlov 6-2,6-1
Challenger Charleston 09/24 20:10 14 Michael Zheng v Stefan Kozlov 5-7,3-6
Challenger Columbus 09/17 16:55 14 Stefan Kozlov v Jack Anthrop 4-6,6-4,4-6
ATP Winston-Salem 08/19 17:05 14 Inaki Montes-De La Torre v Stefan Kozlov 3-6,6-1,6-3
ATP Indian Wells 03/07 04:25 44 Roberto Marcora v Stefan Kozlov 6-1,6-3
ATP Delray Beach 02/11 17:10 14 Matija Pecotic v Stefan Kozlov Retired
ATP Delray Beach 02/11 16:20 14 Yosuke Watanuki v Stefan Kozlov Cancelled
ATP Dallas 02/06 18:00 19 [265] Zachary Svajda v Stefan Kozlov [224] 6-3,6-4
ATP Dallas 02/05 18:45 14 Thai-Son Kwiatkowski v Stefan Kozlov 3-6,4-6
Challenger Cleveland 02/03 16:15 27 [239] Stefan Kozlov v Yibing Wu [112] 4-6,1-6
Challenger Cleveland 02/02 17:45 26 Stefan Kozlov v Ryan Harrison 6-4,6-4
Challenger Cleveland 01/31 16:20 25 Stefan Kozlov v Patrick Kypson 6-4,7-6
Challenger Tenerife 01/17 16:20 25 [199] Stefan Kozlov v Lorenzo Giustino [267] Retired
Australian Open 01/09 04:15 14 [198] Stefan Kozlov v Oleksii Krutykh [185] 5-7,2-6
Challenger Champaign 11/14 22:55 25 [158] Stefan Kozlov v Prajnesh Gunneswaran [381] 6-3,3-6,4-6
Challenger Knoxville 11/11 17:00 27 [183] Enzo Couacaud v Stefan Kozlov [159] 6-3,7-5
Challenger Knoxville 11/09 22:20 26 [382] Prajnesh Gunneswaran v Stefan Kozlov [159] 4-6,3-6
Challenger Knoxville 11/07 20:30 25 [460] Martin Damm v Stefan Kozlov [159] 7-6,3-6,2-6
Challenger Charlottesville 11/03 19:20 26 [328] Lucas Gerch v Stefan Kozlov [132] 6-4,7-6

Wikipedia - Stefan Kozlov

Stefan Kozlov (Russian: Стефан Козлов, STEF-ahn KOZ-lov; born February 1, 1998) is an American professional tennis player of Russian descent. He has a career-high ATP ranking of world No. 103 achieved on 18 July 2022 and doubles ranking of world No. 180 on 19 June 2017.

Kozlov made his ATP World Tour debut as a wildcard in 2013 Hall of Fame Tennis Championships at the age of 15. He reached two junior Grand Slam finals in 2014 and finished the year at World No. 3 in the ITF Junior Combined rankings.