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.