Stadium: Court 3 Round: 28 Ground: Hardcourt indoor
| Challenger - Hambourg - Doubles Hommes | 2023/10/19 13:20 | Habib/Somani v Istomin D / Karlovskiy E | 4-6,6-7 |
| Challenger - Hambourg - Doubles Hommes | 2023/10/18 12:55 | Istomin D / Karlovskiy E v Harris/Stevenson | 7-6,6-3 |
| ITF M25 Falun MD | 2023/09/27 16:30 | Istomin D / Karlovskiy E v Matusevich/Wendelken | 6-7,6-7 |
| ITF M25 Falun MD | 2023/09/26 17:25 | Istomin D / Karlovskiy E v Barrett/Renard | 7-5,6-1 |
| ITF M25 Astana MD | 2023/08/01 11:55 | Lomakin/Shalkhimbayev v Istomin D / Karlovskiy E | 0-6,1-6 |
| Astana, Kazakhstan, Doubles | 2023/07/27 10:45 | Matsui/Uesugi v Istomin D / Karlovskiy E | 6-4,7-6 |
| Astana, Kazakhstan, Doubles | 2023/07/26 11:45 | Istomin D / Karlovskiy E v Bertrand/Kimhi | 4-6,6-1,10-8 |
| Challenger Pozoblanco MD | 2023/07/20 21:35 | Istomin D / Karlovskiy E v Marrero/Moreno De Alboran | 4-6,7-6,10-12 |
| Challenger - Hambourg - Doubles Hommes | 2023/10/19 15:30 | Novak/Santillan v Reese/Walton | 6-1,7-6 |
| Challenger - Hambourg - Doubles Hommes | 2023/10/17 15:45 | Novak/Santillan v Duran/Larwig | 6-0,6-4 |