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 M25 Austin | 2021/11/17 20:00 | Eliot Spizzirri v Constantin Frantzen | 6-3,6-3 |
| ITF M25 Austin | 2021/11/16 16:50 | Constantin Frantzen v Miguel Angel Cabrera | 6-2,6-4 |
| ITF M25 Austin | 2021/11/15 18:00 | Nevin Arimilli v Constantin Frantzen | 4-6,4-6 |
| ITF M25 - Harlingen | 2021/11/09 15:00 | Noah Schachter v Constantin Frantzen | 7-6,6-2 |
| ITF M25 - Fayetteville | 2021/11/02 14:00 | Constantin Frantzen v Mathieu Scaglia | 4-6,5-7 |
| ITF M25 - Fayetteville | 2021/11/01 14:00 | Blu Baker v Constantin Frantzen | 7-6,3-6,5-10 |
| 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 |