| ITF USA F12 | 04/07 19:35 | 26 | Sebastian Fanselow v Dennis Nevolo | 5-7,4-6 | |
| ITF USA F12 | 04/05 16:00 | 25 | Daniel Garza v Sebastian Fanselow | Retired | |
| ITF USA F11 | 03/24 18:25 | 26 | Henri Laaksonen v Sebastian Fanselow | 7-6,6-1 | |
| ITF USA F11 | 03/22 17:00 | 25 | Sebastian Fanselow v Wil Spencer | 6-0,6-1 | |
| ITF USA F10 | 03/20 02:45 | 28 | Sebastian Fanselow v Michael Mmoh | 3-6,3-6 | |
| ITF USA F10 | 03/17 19:30 | 26 | Sebastian Fanselow v Jonathan Mridha | 6-3,6-4 | |
| ITF Canada F2 | 03/09 21:30 | 25 | Filip Peliwo v Sebastian Fanselow | 7-6,1-6,6-3 | |
| ITF Canada F1 | 03/02 15:00 | 25 | Sebastian Fanselow v Hugo Nys | 1-6,3-6 | |
| Challenger Launceston Qual | 01/30 03:00 | 46 | Sebastian Fanselow v Lawrence Bataljin | Retired | |
| ITF USA F2 | 01/14 20:10 | 26 | Nicolas Meister v Sebastian Fanselow | 4-6,3-6 | |
| ITF USA F2 | 01/12 18:00 | 25 | Tom Fawcett v Sebastian Fanselow | 6-3,0-6,5-7 | |
| ITF USA F1 | 01/08 18:00 | 27 | Tennys Sandgren v Sebastian Fanselow | 5-7,6-4,7-6 | |
| ITF USA F1 | 01/07 21:20 | 26 | Sebastian Fanselow v Evan King | 4-6,6-3,6-4 | |
| ITF USA F1 | 01/06 01:00 | 25 | Eric James Johnson v Sebastian Fanselow | 1-6,1-6 | |
| ITF Australia F10 | 11/19 23:00 | 27 | Sebastian Fanselow v Robin Stanek | 2-6,6-7 | |
| ITF Australia F10 | 11/19 01:05 | 26 | Sebastian Fanselow v Blake Mott | 4-6,6-4,6-0 | |
| ITF Australia F10 | 11/18 01:30 | 25 | Sebastian Fanselow v Adam O'Shannessy | 6-2,6-0 | |
| ITF Australia F10 | 11/14 23:30 | 29 | Sebastian Fanselow v Benjamin Mitchell | 1-6,4-6 | |
| ITF Australia F10 | 11/13 23:30 | 28 | Sebastian Fanselow v Finn Tearney | 6-4,6-2 | |
| ITF Australia F10 | 11/12 23:30 | 27 | Connor Smith v Sebastian Fanselow | 7-5,0-6,0-6 | |
| ITF Australia F10 | 11/12 02:00 | 26 | Sebastian Fanselow v Harry Bourchier | 7-6,6-3 | |
| ITF Australia F10 | 11/11 04:45 | 25 | Daniel Nolan v Sebastian Fanselow | 3-6,1-6 | |
| Challenger Traralgon | 10/25 23:00 | 25 | Bradley Mousley v Sebastian Fanselow | 7-6,7-6 | |
| Challenger Traralgon Qual | 10/24 23:00 | 44 | Sebastian Fanselow v Marc Polmans | 6-1,6-3 | |
| ITF USA F27 | 09/23 21:30 | 25 | Sebastian Fanselow v Eric James Johnson | 5-7,3-6 | |
| ITF USA F26 | 09/19 17:00 | 28 | Sebastian Fanselow v Deiton Baughman | 3-6,3-6 | |
| ITF USA F26 | 09/18 17:00 | 27 | Sebastian Fanselow v Ernesto Escobedo | 6-3,7-5 | |
| ITF USA F26 | 09/16 16:00 | 25 | Aleksandar Vukic v Sebastian Fanselow | 3-6,6-7 | |
| ITF Germany F7 | 07/16 10:45 | - | Dusan Lojda v Sebastian Fanselow | 6-2,6-1 | |
| ITF Germany F7 | 07/15 13:10 | - | Sebastian Fanselow v Juan Lizariturry | 6-0,7-5 |