[196] Wolf, Jeffrey John 6-2,3-6,5-7 Stefan Kozlov [301] 2021-09-25 16:00
Stadium: Court 1 Round: 28 Ground: Hardcourt indoor
Face à face
| Challenger Champaign | 2019/11/15 16:00 | Stefan Kozlov v Wolf, Jeffrey John | 2-6,2-6 |
| Challenger Columbus | 2019/01/07 19:00 | Wolf, Jeffrey John v Stefan Kozlov | 6-2,7-6 |
| ITF USA F13 | 2016/04/13 23:00 | Wolf, Jeffrey John v Stefan Kozlov | 1-6,3-6 |
Home History
| Challenger Columbus | 2021/09/24 17:40 | Tennys Sandgren v Wolf, Jeffrey John | 3-6,6-3,6-7 |
| Challenger Columbus | 2021/09/23 16:20 | King, Evan v Wolf, Jeffrey John | 3-6,0-6 |
| Challenger Columbus | 2021/09/21 18:10 | Mukund Sasikumar v Wolf, Jeffrey John | 3-6,2-6 |
| US Open, New York, USA | 2021/08/26 15:00 | Kamil Majchrzak v Wolf, Jeffrey John | 6-3,7-6 |
| US Open, New York, USA | 2021/08/24 15:00 | Wolf, Jeffrey John v Istomin, Denis | 7-5,6-2 |
| Cincinnati, USA | 2021/08/14 20:35 | Wolf, Jeffrey John v Marcos Giron | 3-6,3-6 |
| Toronto, Canada | 2021/08/07 18:10 | Frances Tiafoe v Wolf, Jeffrey John | 6-2,0-6,6-4 |
| Washington, USA | 2021/08/01 21:05 | Wolf, Jeffrey John v Elias Ymer | 6-7,6-7 |
Away History
| Challenger Columbus | 2021/09/24 15:00 | Torpegaard, Mikael v Stefan Kozlov | 6-2,6-7,4-6 |
| Challenger Columbus | 2021/09/23 15:00 | Jason Kubler v Stefan Kozlov | 2-6,5-7 |
| Challenger Columbus | 2021/09/21 19:45 | Stefan Kozlov v Mitchell Krueger | 6-0,6-3 |
| Challenger Kyiv | 2021/09/06 12:00 | Franco Agamenone v Stefan Kozlov | 6-4,7-5 |
| Challenger Mallorca | 2021/09/02 16:25 | Stefan Kozlov v Verdasco, Fernando | 6-1,6-7,2-6 |
| Challenger Mallorca | 2021/08/31 12:55 | Daniel Rincon v Stefan Kozlov | 3-6,6-1,1-6 |
| US Open, New York, USA | 2021/08/24 15:00 | Bernabe Zapata Miralles v Stefan Kozlov | 7-5,1-6,6-3 |
| Challenger Lexington | 2021/07/29 20:00 | Stefan Kozlov v Alejandro Tabilo | 2-6,2-6 |