| ITF Germany F11 | 08/16 10:30 | 25 | Sebastian Fanselow v Dan Added | 5-7,6-4,7-6 | |
| ITF Germany F10 | 08/08 14:20 | 25 | Julian Lenz v Sebastian Fanselow | 7-5,3-6,6-4 | |
| ITF Germany F9 | 08/02 13:30 | 26 | Rudolf Molleker v Sebastian Fanselow | 6-4,6-3 | |
| ITF Germany F9 | 08/01 09:00 | 25 | Mats Rosenkranz v Sebastian Fanselow | 3-6,5-7 | |
| ITF Germany F8 | 07/20 13:30 | 26 | Sebastian Fanselow v Dominik Boehler | 4-6,6-2,4-6 | |
| ITF Germany F8 | 07/19 13:00 | 25 | [331] Sebastian Fanselow v Niels Lootsma [428] | 7-6,6-3 | |
| ITF Italy F16 | 06/08 10:00 | 27 | [340] Sebastian Fanselow v Orlando Luz [493] | 3-6,6-4,6-7 | |
| ITF Italy F16 | 06/07 08:30 | 26 | Sebastian Fanselow v Jason Kubler | 6-3,6-7,6-3 | |
| ITF Italy F16 | 06/06 07:30 | 25 | Sebastian Fanselow v Tobias Simon | 4-6,6-4,6-0 | |
| ITF Italy F15 | 05/30 11:20 | 25 | [200] Vaclav Safranek v Sebastian Fanselow [340] | 6-3,6-4 | |
| Challenger Heilbronn Qual | 05/15 10:00 | 54 | [377] Dominik Koepfer v Sebastian Fanselow [337] | 7-6,6-4 | |
| Challenger Heilbronn Qual | 05/14 09:00 | 46 | [473] Bradley Klahn v Sebastian Fanselow [337] | 5-7,6-7 | |
| Challenger Heilbronn Qual | 05/13 08:00 | 45 | [337] Sebastian Fanselow v Matteo Donati [217] | 7-6,6-4 | |
| ITF USA F13 | 04/13 23:00 | 26 | [500] Jared Hiltzik v Sebastian Fanselow [340] | 3-6,7-5,6-2 | |
| ITF USA F13 | 04/11 18:30 | 25 | Yosuke Watanuki v Sebastian Fanselow | 2-6,0-6 | |
| ITF USA F12 | 04/04 15:00 | 25 | [360] Brayden Schnur v Sebastian Fanselow [336] | 6-1,1-6,6-3 | |
| ITF USA F11 | 03/26 20:00 | 29 | Sebastian Fanselow v Bradley Klahn | 6-3,6-2 | |
| ITF USA F11 | 03/25 20:30 | 28 | Mackenzie McDonald v Sebastian Fanselow | Walkover | |
| ITF USA F11 | 03/24 18:00 | 27 | Sebastian Fanselow v Jared Hiltzik | 6-3,6-4 | |
| ITF USA F11 | 03/23 18:20 | 26 | Sebastian Fanselow v John Lamble | 6-2,6-0 | |
| ITF USA F11 | 03/22 18:35 | 25 | Sebastian Fanselow v Alexios Halebian | 6-4,7-5 | |
| ITF USA F10 | 03/19 00:00 | 28 | [394] Sebastian Fanselow v Dmitry Popko [211] | 3-6,4-6 | |
| ITF USA F10 | 03/18 02:30 | 27 | [456] Christian Harrison v Sebastian Fanselow [394] | 4-6,6-2,5-7 | |
| ITF USA F10 | 03/16 18:00 | 26 | Luca Gelhardt v Sebastian Fanselow | 2-6,0-6 | |
| ITF USA F10 | 03/14 19:25 | 25 | [197] Fred Simonsson v Sebastian Fanselow [394] | 5-7,3-6 | |
| ITF Indonesia F3 | 02/26 03:00 | 29 | Alexandre Muller v Sebastian Fanselow | 1-6,3-6 | |
| ITF Indonesia F3 | 02/25 03:00 | 28 | Sho Shimabukuro v Sebastian Fanselow | 4-6,5-7 | |
| ITF Indonesia F3 | 02/24 03:00 | 27 | Sebastian Fanselow v Evan King | 6-1,6-2 | |
| ITF Indonesia F3 | 02/23 03:00 | 26 | Sebastian Fanselow v Yutaro Matsuzaki | 6-3,6-1 | |
| ITF Indonesia F3 | 02/22 07:10 | 25 | Sebastian Fanselow v Jorge Montero | 6-3,6-3 |