Stadium: Court N5 Round: 25 Ground: Hardcourt outdoor
| US Open | 2021/08/26 22:55 | Henri Laaksonen v Eliot Spizzirri | 3-6,7-6,6-4 |
| US Open | 2021/08/25 22:20 | Alejandro Tabilo v Eliot Spizzirri | 7-5,6-7,3-6 |
| ITF M25 Decatur | 2021/08/08 17:00 | Aidan Mchugh v Eliot Spizzirri | 2-6,5-7 |
| ITF M25 Decatur | 2021/08/07 14:45 | Eliot Spizzirri v Alex Rybakov | 6-4,7-5 |
| ITF M25 Decatur | 2021/08/06 17:10 | Yunseong Chung v Eliot Spizzirri | 4-6,4-6 |
| ITF M25 Decatur | 2021/08/05 18:35 | Eliot Spizzirri v Alfredo Perez | 5-7,6-1,6-1 |
| ITF M25 Decatur | 2021/08/04 16:55 | Preston Brown v Eliot Spizzirri | 0-6,3-6 |
| ITF M25 Decatur | 2021/08/03 15:00 | Eliot Spizzirri v Jesse Flores | 4-6,6-2,10-3 |
| 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 |
| ITF M25 Fort Worth | 2019/10/20 15:00 | Constantin Frantzen v Ricardo Alban | 6-3,6-0 |