ITF USA F10 03/19 22:15 - Darian King v Stefan Kozlov 1-6,6-1,6-1
ITF USA F10 03/18 03:35 - Stefan Kozlov v Evan Song 6-3,6-4
ATP Delray Beach 02/17 18:25 25 Tim Smyczek v Stefan Kozlov 7-5,6-2
ATP Memphis 02/10 02:30 25 Jared Donaldson v Stefan Kozlov 7-5,6-0
ITF USA F4 01/16 18:00 - Stefan Kozlov v Frederik Nielsen 6-7,6-4,0-6
ITF USA F4 01/15 18:00 - Dennis Novikov v Stefan Kozlov 0-6,1-6
ITF USA F4 01/14 19:45 - Stefan Kozlov v Karim Hossam 6-3,6-1
ITF USA F2 01/09 18:00 - Taylor Fritz v Stefan Kozlov 6-4,6-4
ITF USA F2 01/08 18:00 - Clay Thompson v Stefan Kozlov 2-6,6-2,3-6
Challenger Charlottesville 10/28 21:30 25 Peter Torebko v Stefan Kozlov 6-3,7-6
ITF USA F26 09/23 18:35 - Stefan Kozlov v Patrick Davidson 6-3,6-2
US Open Qual 08/21 20:25 45 Stefan Kozlov v Borna Coric 6-2,2-6,2-6
US Open Qual 08/20 19:15 44 Mitchell Frank v Stefan Kozlov 6-3,0-6,2-6
ATP Washington Qual 07/26 14:00 45 Sam Groth v Stefan Kozlov 3-6,7-6,6-4
ITF Spain F10 05/22 10:00 - Stefan Kozlov v Juan Lizariturry 2-6,7-5,4-6
ITF Spain F10 05/20 10:50 - Sergio Martos Gornes v Stefan Kozlov 2-6,3-6
ITF USA F11 04/12 16:00 - Filip Krajinovic v Stefan Kozlov 3-6,6-4,6-3
ITF USA F11 04/10 17:20 - Stefan Kozlov v Nicolas Meister 7-6,6-2
ITF USA F11 04/09 14:00 - Catalin-Ionut Gard v Stefan Kozlov 3-6,4-6
ITF USA F9 03/18 18:50 - Darian King v Stefan Kozlov Retired
ITF USA F8 03/12 19:40 - Darian King v Stefan Kozlov 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.