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