Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Monastir | 2022/01/23 10:15 | Niccolo Baroni v Dax Donders | 4-6,4-6 |
| ITF M25 Trento | 2020/02/24 08:55 | Niccolo Baroni v Leonardo Taddia | 2-6,6-3,6-10 |
| ITF M25 Monastir | 2022/01/23 11:30 | Constantin Frantzen v Dominik Recek | 3-6,4-6 |
| ITF M25 Monastir | 2022/01/19 10:05 | Constantin Frantzen v Moez Echargui | 2-6,2-6 |
| ITF M25 Monastir | 2022/01/17 11:40 | Zi Hui Chen v Constantin Frantzen | 0-6,2-6 |
| ITF M25 Monastir | 2022/01/16 12:30 | Tobias Brutscher v Constantin Frantzen | 2-6,1-6 |
| 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 |