| ITF - M15 Heraklion | 11/19 09:30 | 26 | [417] Sebastian Fanselow v Maxime Hamou [364] | 2-6,4-6 | |
| ITF - M15 Heraklion | 11/17 08:30 | 25 | Petros Tsitsipas v Sebastian Fanselow | 2-6,3-6 | |
| ITF - M15 Heraklion | 11/13 13:30 | 27 | Mateus D C C Alves v Sebastian Fanselow | 6-3,6-2 | |
| ITF - M15 Heraklion | 11/13 08:30 | 26 | Luke Johnson v Sebastian Fanselow | 4-6,1-6 | |
| ITF - M15 Heraklion | 11/12 07:30 | 25 | Sebastian Fanselow v Edan Leshem | 6-2,6-4 | |
| ITF M15 - Quinta Do Lago | 11/08 11:00 | 28 | [423] Sebastian Fanselow v Michael Geerts [393] | 3-6,3-6 | |
| ITF M15 - Quinta Do Lago | 11/07 15:00 | 27 | [423] Sebastian Fanselow v Tsung-Hua Yang [364] | 6-1,6-3 | |
| ITF M15 - Quinta Do Lago | 11/07 10:00 | 26 | Sebastian Fanselow v Luis Faria | 6-4,6-2 | |
| ITF M15 - Quinta Do Lago | 11/04 11:35 | 25 | Sebastian Fanselow v Tiago Cacao | 6-3,6-1 | |
| ITF M25 - Vale Do Lobo | 10/28 15:05 | 25 | [421] Sebastian Fanselow v Kacper Zuk [285] | 4-6,5-7 | |
| ITF M25 - Rodez | 10/14 17:50 | 25 | [468] Antoine C Chauvinc v Sebastian Fanselow [454] | 6-4,6-3 | |
| ITF M15 - Setubal | 10/11 09:30 | 29 | Sebastian Fanselow v Nuno Borges | 6-4,7-6 | |
| ITF M15 - Setubal | 10/10 09:30 | 28 | Sebastian Fanselow v Mateus D C C Alves | 6-3,4-6,6-4 | |
| ITF M15 - Setubal | 10/09 11:50 | 27 | Joao L R Da Silva v Sebastian Fanselow | 6-7,3-6 | |
| ITF M15 - Setubal | 10/08 11:40 | 26 | Evan Furness v Sebastian Fanselow | 3-6,6-3,3-6 | |
| ITF M15 - Setubal | 10/06 11:25 | 25 | [451] Sebastian Fanselow v Camilo Ugo Carabelli [381] | 6-3,3-6,6-3 | |
| ITF M15 - Castelo Branco | 09/24 16:05 | 26 | Riccardo Balzerani v Sebastian Fanselow | 7-6,2-6,6-4 | |
| ITF M15 - Castelo Branco | 09/24 09:00 | 25 | Patrick Kypson v Sebastian Fanselow | 2-6,3-6 | |
| ITF M15 - Sintra | 09/20 11:00 | 29 | Carlos Gimeno Valero v Sebastian Fanselow | 6-4,3-6,6-4 | |
| ITF M15 - Sintra | 09/19 11:30 | 28 | Sebastian Fanselow v Nicolas Alvarez Varona | 6-1,6-4 | |
| ITF M15 - Sintra | 09/18 14:00 | 27 | Sebastian Fanselow v Nuno Borges | 6-4,6-4 | |
| ITF M15 - Sintra | 09/17 12:00 | 26 | [476] Sebastian Fanselow v Benjamin Winter Lopez [447] | 6-3,6-4 | |
| ITF M15 - Sintra | 09/15 08:25 | 25 | Sebastian Fanselow v Nick Hardt | 2-6,7-5,6-2 | |
| ITF M15 - Sintra | 09/11 08:30 | 27 | Nuno Borges v Sebastian Fanselow | 7-5,6-4 | |
| ITF M15 - Sintra | 09/10 08:30 | 26 | Benjamin Pietri v Sebastian Fanselow | 2-6,2-6 | |
| ITF M15 - Sintra | 09/08 08:30 | 25 | Nick Hardt v Sebastian Fanselow | 0-6,3-6 | |
| ITF M15 - Anif | 08/26 11:40 | 25 | [473] Sebastian Fanselow v Sadio Doumbia [374] | 2-6,2-6 | |
| Tennis Point Exhibition Series | 07/18 08:30 | - | [474] Sebastian Fanselow v Luca Gelhardt [486] | 3-6,4-6 | |
| Tennis Point Exhibition Series | 07/17 09:25 | - | [474] Sebastian Fanselow v Frederik Nielsen [55] | 6-3,6-7,2-6 | |
| Tennis Point Exhibition Series | 07/16 07:00 | - | Sebastian Fanselow v Constantin Schmitz | 1-6,6-4,4-6 |