Challenger Leon 03/30 19:00 26 [122] Stefan Kozlov v Ram, Rajeev [184] 1-6,6-7
Challenger Leon 03/29 18:20 25 [122] Stefan Kozlov v Petrovic, Danilo [326] 6-4,6-2
Miami, USA, Qualifying 03/21 15:20 45 [95] Donaldson, Jared v Stefan Kozlov [122] 7-5,6-3
Miami, USA, Qualifying 03/20 15:15 44 Nicola Kuhn v Stefan Kozlov 3-6,6-3,3-6
ATP - Indian Wells 03/11 00:40 23 [60] Young, Donald v Stefan Kozlov [116] 7-5,7-6
ATP - Acapulco 02/28 04:40 25 Ernesto Escobedo v Stefan Kozlov 6-1,2-6,6-0
Acapulco, Mexico, Qualifying 02/26 22:00 - Stefan Kozlov v Donaldson, Jared 7-5,6-3
Acapulco, Mexico, Qualifying 02/25 23:35 26 Chung, Hyeon v Stefan Kozlov 2-6,2-6
ATP - Delray Beach 02/21 19:05 25 Steve Johnson v Stefan Kozlov 6-1,6-4
Challenger Tempe 02/17 17:00 27 Gabashvili, Teimuraz v Stefan Kozlov 6-3,6-1
Challenger Tempe 02/15 17:30 26 Quiroz, Roberto v Stefan Kozlov 4-6,6-7
Challenger Tempe 02/13 21:50 25 Klahn, Bradley v Stefan Kozlov 1-6,5-7
Australian Open 2017 Qual 01/11 00:30 44 Stefan Kozlov v Bhambri, Yuki 1-6,4-6
ATP Brisbane Qual 12/31 05:55 - Smith, John-Patrick v Stefan Kozlov 6-2,6-3
Columbus II, USA 11/27 20:00 29 Stefan Kozlov v Tennys Sandgren 6-1,2-6,6-2
Columbus II, USA 11/26 23:40 28 Barry, Sam v Stefan Kozlov 5-7,6-7
Columbus II, USA 11/25 18:45 27 Stefan Kozlov v King, Kevin 6-2,7-5
Columbus II, USA 11/23 16:15 26 Stefan Kozlov v Dominik Koepfer 6-3,6-4
Columbus II, USA 11/22 20:00 25 Stefan Kozlov v Statham, Rubin 6-2,7-6
Challenger Champaign 11/16 18:10 26 Michael Mmoh v Stefan Kozlov 6-1,6-4
Challenger Champaign 11/15 16:00 25 Krajicek, Austin v Stefan Kozlov 4-6,6-7
Challenger Knoxville 11/12 16:40 28 Stefan Kozlov v Michael Mmoh 0-6,3-6
Challenger Knoxville 11/12 01:10 27 Stefan Kozlov v Corrie, Edward 6-4,6-3
Challenger Knoxville 11/10 19:10 26 Stefan Kozlov v Tennys Sandgren 6-2,6-4
Challenger Knoxville 11/08 19:40 25 Stefan Kozlov v Barry, Sam 6-4,7-5
Suzhou, China 10/30 02:30 29 Lu, Yen-Hsun v Stefan Kozlov 6-0,6-1
Suzhou, China 10/29 03:00 28 Stefan Kozlov v Kudryavtsev, Alexander Retired
Suzhou, China 10/28 05:30 27 Stefan Kozlov v Stakhovsky, Sergiy 3-6,6-2,7-5
Suzhou, China 10/27 03:30 26 Stefan Kozlov v Kim, Cheong-Eui 6-4,6-3
Suzhou, China 10/25 05:20 25 Stefan Kozlov v He, Yecong 5-7,6-0,6-4

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.