Stadium: Court 2 Round: 62 Ground: Hardcourt outdoor
| 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 |
| ITF USA F39 | 2017/11/27 22:40 | Constantin Frantzen v Bjoern Petersen | 6-1,3-6,6-4 |