Stadium: Court 6 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Jablonec Nad Nisou | 2020/09/20 12:00 | Tobias Brutscher v Matias Zukas | 2-6,1-6 |
| ITF M25 Klosters | 2020/09/14 08:35 | Luca Staeheli v Tobias Brutscher | 6-2,6-0 |
| ITF M25 Vogau | 2020/08/16 09:30 | Tobias Brutscher v Neil Oberleitner | 2-6,1-6 |
| ITF M25 Trento | 2020/02/24 10:15 | Tobias Brutscher v Gian Marco Ortenzi | 0-6,1-6 |
| ITF M15 Oberhaching | 2020/02/16 08:00 | Tobias Brutscher v Hazem Naw | 3-6,5-7 |
| ITF M15 Antalya | 2020/01/13 07:00 | Mert Alkaya v Tobias Brutscher | 6-4,6-1 |
| ITF M15 Manacor | 2020/01/05 10:30 | Mateusz Terczynski v Tobias Brutscher | 6-2,6-1 |
| ITF M15 Sarreguemines | 2019/11/17 13:20 | Boris Fassbender v Tobias Brutscher | 6-4,6-2 |
| ITF M15 Lubbock | 2021/09/26 15:00 | Constantin Frantzen v Sven Lah | 3-6,6-1,4-10 |
| ITF M25 Fort Worth | 2019/10/21 15:00 | Constantin Frantzen v Spencer Papa | 5-7,3-6 |
| ITF M25 Fort Worth | 2019/10/20 15:00 | Constantin Frantzen v Ricardo Alban | 6-3,6-0 |
| ITF M25 Waco | 2019/10/13 15:00 | Constantin Frantzen v Alexander Lebedev | 6-7,2-6 |
| ITF USA F34 | 2018/11/26 21:15 | Michael Geerts v Constantin Frantzen | 6-7,6-2,6-4 |
| ITF USA F34 | 2018/11/25 16:00 | Maximilian Sinn v Constantin Frantzen | 4-6,3-6 |
| ITF USA F34 | 2018/11/24 16:00 | Trey Hilderbrand v Constantin Frantzen | 1-6,7-5,5-7 |
| ITF USA F39 | 2017/11/29 16:00 | Constantin Frantzen v Karue Sell | 4-6,1-6 |