Challenger - Savannah | 04/23 14:00 | 25 | [451] Stefan Kozlov v Alexander Ritschard [209] | 3-6,5-7 | |
Challenger Tallahassee | 04/20 16:00 | 28 | Mitchell Krueger v Stefan Kozlov | 6-3,3-6,6-1 | |
Challenger Tallahassee | 04/19 16:00 | 27 | Oliver Crawford v Stefan Kozlov | 2-6,2-6 | |
Challenger Tallahassee | 04/17 23:40 | 26 | Stefan Kozlov v Tennys Sandgren | 6-2,6-7,6-1 | |
Challenger Tallahassee | 04/15 18:20 | 25 | Gerard Campana Lee v Stefan Kozlov | 6-4,3-6,0-6 | |
Challenger Sarasota | 04/12 15:00 | 27 | Tennys Sandgren v Stefan Kozlov | 6-1,6-4 | |
Challenger Sarasota | 04/10 15:00 | 26 | Ethan Quinn v Stefan Kozlov | 2-6,7-5,4-6 | |
Challenger Sarasota | 04/09 17:25 | 25 | Stefan Kozlov v Denis Kudla | 6-2,4-6,6-2 | |
Challenger Sarasota | 04/08 15:00 | 19 | Stefan Kozlov v Gabi Adrian Boitan | 6-3,7-6 | |
Challenger Sarasota | 04/07 16:10 | 14 | Arthur Gea v Stefan Kozlov | 4-6,6-7 | |
ATP Houston | 03/30 21:30 | 14 | Denis Yevseyev v Stefan Kozlov | 6-2,6-0 | |
Challenger San Luis Potosi | 03/25 17:35 | 19 | Roberto Cid Subervi v Stefan Kozlov | 6-2,6-3 |
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.