Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Santo Domingo | 2021/12/07 13:00 | Osgar O'Hoisin v Maikol Ponte | 6-0,6-3 |
| ITF M25 Santo Domingo | 2021/12/06 13:30 | Osgar O'Hoisin v Xavier Lawrence | 6-2,6-1 |
| ITF M15 Santo Domingo | 2021/12/01 16:10 | Jorge Panta v Osgar O'Hoisin | 5-7,7-5,6-1 |
| ITF M15 Guatemala | 2021/11/25 15:30 | Osgar O'Hoisin v Colin Sinclair | 2-6,3-6 |
| ITF M15 Guatemala | 2021/11/23 18:40 | Osgar O'Hoisin v Jose Daniel Bendeck | 6-2,6-1 |
| ITF M15 East Lansing | 2021/11/16 15:00 | Osgar O'Hoisin v Niroop Vallabhaneni | 6-1,1-6,5-10 |
| ITF M15 Ithaca | 2021/11/04 16:20 | Osgar O'Hoisin v Evan Bynoe | 3-6,6-4,3-6 |
| ITF M15 Ithaca | 2021/11/03 16:40 | Evan Zhu v Osgar O'Hoisin | 6-7,3-6 |
| ITF M25 Santo Domingo | 2021/12/07 13:00 | Herbert Jody Maginley v Stefan Cizelj-Zivkovic | 6-1,3-6,10-4 |
| ITF M25 Santo Domingo | 2021/11/29 15:00 | Jesus M Rosario v Stefan Cizelj-Zivkovic | 7-5,6-1 |
| ITF M15 Nules | 2021/11/14 14:00 | Gian Marco Ortenzi v Stefan Cizelj-Zivkovic | 6-0,6-0 |
| ITF M15 Benicarlo | 2021/11/07 08:30 | Tadas Babelis v Stefan Cizelj-Zivkovic | 6-1,6-3 |
| ITF M15 Platja D'Aro | 2021/10/10 10:00 | Stefan Cizelj-Zivkovic v Noah Lopez | 1-6,3-6 |
| ITF M15 Platja D'Aro | 2021/10/05 08:00 | Stefan Cizelj-Zivkovic v Jorge Martinez Martinez | 0-6,1-6 |
| ITF M15 Platja D'Aro | 2021/10/03 08:00 | Zhenxiong Dong v Stefan Cizelj-Zivkovic | 4-6,4-6 |
| ITF M15 Cairo | 2021/09/12 08:00 | Andrei Cuceu v Stefan Cizelj-Zivkovic | 6-4,6-3 |